Study material · Investment Banking Operations

Corporate Actions, start to end

Every mandatory, voluntary, and elective corporate action across equity, fixed income, and funds — what it is, how it's classified, the dates that govern it, what happens to cash and positions, and how it actually moves through the settlement chain. Written for an Ops interview: definitions plus the "why it matters operationally" layer that textbooks skip.

38 corporate action types SWIFT MT564–MT568 ISO 20022 seev.03x Real deal examples

What is a corporate action?

A corporate action is any event initiated by an issuer (a company, government, or fund) that affects its outstanding securities and, in turn, the holders of those securities — their cash, their position, or the terms of what they hold. It can be as routine as a quarterly dividend or as complex as a cross-border, cash-or-stock merger with proration.

For an Operations team, a corporate action is not a market-data event — it's an instruction to move cash and securities correctly, on time, for every affected account, based on a position snapshot that may be sitting anywhere across a chain of custodians. That's why Ops interviews probe two things above all: can you classify an event correctly (because classification drives the workflow), and do you understand the dates and the entitlement math well enough to catch a break before it becomes a client complaint.

Why this matters in Ops specifically

Corporate actions sit at the intersection of custody, settlements, tax, and client service. A missed election deadline, a wrong record-date position, or an unrecognised market claim is real money and a real breach of duty of care — which is exactly why interviewers spend so much time on process, not just definitions.

Classification: the first question in every event

Before anything else, every corporate action is classified along one axis: does the holder have to do anything? This single distinction determines the entire operational workflow — whether Ops merely calculates and pays, or has to capture, validate, and forward an election before a hard deadline.

Mandatory
Voluntary
Mandatory with Choice
Classification reference
TypeAction required from holderIf no instruction is givenTypical examples
MandatoryNone — applied automatically to every eligible positionNot applicable; there is nothing to instructCash dividend, stock split, spin-off, bond maturity, interest payment
VoluntaryYes — an instruction/election must reach the agent before the deadlineThe holder simply does not participate; no entitlement accruesRights subscription, tender offer, exchange offer, consent solicitation, warrant exercise
Mandatory with ChoiceOptional — the event happens regardless, but the holder may choose the form of proceedsThe issuer's pre-defined default option is auto-appliedCash-or-stock merger consideration, dividend reinvestment (DRIP), scrip dividend

You'll see these three categories colour-coded consistently through every card below: brass for mandatory, teal for voluntary, red for mandatory-with-choice.

The lifecycle: five dates that run every event

Almost every corporate action — regardless of asset class — is governed by the same skeleton of dates. Learn this once and you can reason about any event you've never seen before.

  1. 1. Announcement / Declaration Date

    The issuer publicly announces the event's terms — via press release, stock-exchange filing, or board resolution. Data vendors and custodians capture the raw terms, cross-check them against a second or third source, and produce a validated "golden record." The first client-facing notification (SWIFT MT564 NEWM / ISO 20022 seev.031) goes out from here.

  2. 2. Record Date

    The snapshot date. Whoever is the registered/beneficial holder of the security as of the close of business on this date, per the CSD's books, is entitled to the benefit. Everything about entitlement calculation traces back to "what was the position on record date."

  3. 3. Ex-Date (Ex-Entitlement Date)

    The first day the security trades without the entitlement attached. It is set relative to the market's settlement cycle so that only a trade that will actually settle by record date carries the benefit. Since the US moved to T+1 settlement in May 2024, ex-date and record date effectively align for most US equities; under the older T+2 cycle, ex-date sat one business day before record date. The exchange typically marks the security's opening price down by the value of the entitlement on ex-date.

  4. 4. Election / Response Deadline (voluntary & choice events only)

    The date by which an instruction must reach the agent. Note there are always two deadlines: the official "market deadline" set by the issuer/agent, and an earlier internal "custodian cut-off" — Ops always sets its own cut-off well ahead of the market deadline, because an instruction has to travel back up the chain (client → broker/custodian → sub-custodian → CSD → registrar) and each hop needs processing time. Missing the internal cut-off, not just the market deadline, is the real operational risk.

  5. 5. Payment / Effective Date

    Cash is credited, new securities are delivered, or — for a merger, split, or restructuring — the corporate change legally takes effect. Confirmations (MT566 / seev.036) are issued, and Ops reconciles the entitlement actually received against what was expected, chasing any shortfall as an income break.

Players in the chain

A notification rarely travels in one hop. Understanding this chain is what separates a textbook answer from an Ops answer.

Issuer
Registrar / Paying Agent
CSD / ICSD
DTC · Euroclear · Clearstream · NSDL/CDSL
Global Custodian
Sub-custodian
local agent
Broker-Dealer / Asset Manager
Beneficial Owner

Ops teams typically sit at the custodian / sub-custodian / broker-dealer layer: taking a CSD-level notification, mapping it to every affected client account, calculating each account's entitlement, and — for voluntary events — collecting client elections and pushing them back up the same chain before the internal cut-off.

SWIFT & ISO 20022 messaging

Corporate action data moves between institutions on standardised messages. ISO 15022 (the "MT" family) is still dominant in many markets; ISO 20022 (the "MX / seev" family) is its structured-XML successor and the direction the industry is migrating toward.

Message reference
ISO 15022 (MT)ISO 20022 (MX)PurposeSent by
MT564seev.031Notification — announces event terms, options, and (later) computed entitlementsAccount servicer → account owner
MT565seev.033Instruction — the holder's election on a voluntary / choice eventAccount owner → account servicer
MT567seev.032 / seev.034Status & processing advice — acknowledges, accepts, or rejects an instruction; reports event processing statusAccount servicer → account owner
MT566seev.036Confirmation — confirms the actual cash/securities movement once paidAccount servicer → account owner
MT568seev.038Narrative — supplementary free-format text or legal notices attached to any of the aboveEither direction

Typical flow for a voluntary event: MT564 (NEWM) announces it → the client instructs via MT565 → the agent confirms receipt/acceptance via MT567 → on payment date, MT566 confirms what was actually delivered. If terms change mid-event, a replacement MT564 (REPL) is issued; if the event is pulled, MT564 (CANC) follows.

Interview-ready line

"MT564 notifies, MT565 instructs, MT567 acknowledges status, MT566 confirms payment, MT568 carries the narrative." If you can say that in one breath, you've covered the messaging basics most interviewers are actually listening for.

Market claims, transformations & buyer protection

These three mechanisms exist because trade settlement and corporate action dates don't always line up — a trade can be agreed before ex-date but still be unsettled after record date. This is one of the most commonly tested topics in an Ops interview.

Market Claim

A trade executes before ex-date (so the buyer is economically entitled to the upcoming benefit) but fails to settle until after record date. Because the CSD still shows the seller as the record holder, the seller receives the entitlement from the issuer — but it economically belongs to the buyer. The CSD/custodian automatically raises a compensating "market claim" transaction between the two counterparties so the entitlement passes from seller to buyer, keeping the outcome consistent with the trade's ex-date rather than its settlement date.

Transformation

A mandatory (or mandatory-with-choice) event changes the nature of a security while a trade in the old security is still pending settlement — for example, a cash merger converts Company A shares into a fixed cash amount per share. Any open trade that hasn't settled by the effective date is automatically "transformed": the CSD converts the pending deliverable from shares into the cash (or new-security) equivalent so the trade can still settle cleanly.

Buyer Protection

Applies to voluntary/elective events. If a buyer's trade hasn't settled by the event's deadline, the buyer isn't yet the record holder and normally couldn't elect. Buyer protection is a formal mechanism (in the US, administered via DTCC) letting the buyer file a protected instruction asserting their economic right to elect — preserving their ability to participate despite not yet holding the position of record.

Risk, controls & STP

What actually goes wrong in corporate actions processing — and what Ops does to prevent it.

Common risk points and controls
RiskWhy it happensControl
Wrong event terms capturedConflicting data across vendors/sourcesCross-source validation into a single "golden record" before any client notification goes out
Missed electionInstruction arrives after the market deadlineInternal cut-off set well ahead of the market deadline, with escalation reminders to clients
Wrong default appliedClient is silent on a mandatory-with-choice eventPre-agreed standing instructions on file; proactive reminders before cut-off
Income breakEntitlement received ≠ entitlement expected (holding × rate)Automated entitlement recalculation and reconciliation against custodian credit; investigate and claim shortfalls
Unclaimed market claimSettlement fail across ex/record date not recognisedAutomated market-claims engine at the CSD/custodian level
Incorrect withholding taxInvestor tax documentation/treaty relief not on fileTax documentation held with custodian; relief-at-source or reclaim process

STP (Straight-Through-Processing) rate — the percentage of notifications and instructions processed without manual intervention — is the headline KPI for a corporate actions desk. Voluntary and complex mandatory-with-choice events pull STP down because they require validated, timely, human-readable elections; pure mandatory cash events (like a plain dividend) should approach 100% STP.

Part I — Equity Corporate Actions

17 events
Mandatory

Cash Dividend

DVCA

Distribution of cash to equity holders out of company profits or reserves, in proportion to shareholding. The most routine, highest-volume corporate action any Ops desk processes.

AnnouncementBoard declares dividend rate
Record DateSnapshot of eligible holders
Ex-DatePrice marked down
Payment DateCash credited

Mechanics & Entitlement

Entitlement = record-date position × dividend rate per share. Currency conversion applies if paid in a currency other than the holder's base currency; some issuers offer a currency election.

Settlement & Accounting Impact

Cash credited to the account, typically net of withholding tax deducted at source per the holder's tax residency/treaty documentation; gross and net amounts are both reported. Pure cash event — no position movement.

Real-world exampleQuarterly dividends from NYSE, LSE and NSE blue chips are almost all plain DVCA events — the single highest-volume corporate action type any custodian handles.

Mandatory

Stock Dividend & Bonus Issue

DVSE / BONU

Distribution of additional shares to existing holders — instead of cash (stock dividend) or free of payment on top of the existing holding (bonus/capitalisation issue) — in proportion to holding. Markets mainly distinguish the two by accounting source (retained earnings vs. share premium/reserves) and tax treatment.

AnnouncementRatio declared, e.g. 1:1
Record Date
Ex-DatePrice adjusted for dilution
Credit DateNew shares allotted

Mechanics & Entitlement

New shares = holding × bonus ratio, usually rounded down with the fraction paid as cash-in-lieu. Market price is adjusted down on ex-date proportionate to the dilution — total position value is roughly unchanged.

Settlement & Accounting Impact

Free-of-payment securities credit; no cash movement aside from fractional cash-in-lieu. Average cost per share is recalculated by spreading the original cost basis across the new, larger share count.

Real-world exampleIndian issuers frequently issue bonus shares (e.g., ratios like 1:1); each event increases share count and reduces market price proportionally, leaving pre-market-movement holding value unchanged.

Mandatory with Choice

Dividend Reinvestment (DRIP) / Scrip Dividend

DRIP / DVOP

A cash dividend where the holder may elect to receive newly issued or market-purchased shares of equivalent value instead of cash — or, in a scrip structure, shares by default with a cash option.

Announcement
Record Date
Ex-Date
Election Deadline
Payment / Allotment

Mechanics & Entitlement

Election is per holding; if silent, the issuer's stated default (usually cash) applies. Share entitlement = elected cash amount ÷ a reinvestment reference price, often set at a small discount to market.

Settlement & Accounting Impact

A cash-electing holder is processed exactly like a DVCA. A stock-electing holder gets a FoP securities credit instead, with the cash amount recorded internally as "reinvested" — still relevant for tax reporting even though no cash actually moved.

Real-world exampleDRIP programmes are common with income-focused blue chips and REITs, letting long-term holders compound their position without brokerage costs on each reinvestment.

Mandatory

Stock Split (Forward)

SPLF

Each existing share is subdivided into a larger number of shares (e.g., 10-for-1), reducing the price per share proportionally with no change to total investment value or market cap.

AnnouncementSplit ratio declared
Record Date
Ex-Date / Effective DateRatio applied

Mechanics & Entitlement

New holding = old holding × split ratio. Reference price is divided by the same ratio — a re-denomination of the same economic interest into more units.

Settlement & Accounting Impact

Position increased via a free-of-payment event; no cash movement. Average cost per share is divided by the ratio so total cost basis is unchanged; exchanges auto-adjust open orders and limit prices.

Real-world exampleNvidia executed a 10-for-1 forward split effective 7 June 2024 — a holder of 100 shares became a holder of 1,000 at one-tenth the price. Amazon carried out a 20-for-1 split in June 2022.

Mandatory

Reverse Stock Split

SPLR

The opposite of a forward split — existing shares are consolidated into a smaller number (e.g., 1-for-10), raising the per-share price proportionally. Often used to meet an exchange's minimum-price listing rule or reduce an unwieldy share count.

Announcement
Record Date
Ex-Date / Effective Date

Mechanics & Entitlement

New holding = old holding ÷ consolidation ratio, rounded down; fractional shares are almost always cashed out rather than issued, since exchanges don't trade in fractions.

Settlement & Accounting Impact

Position reduced via a FoP event; fractional entitlement paid as cash-in-lieu at the post-split reference price; average cost per share is multiplied by the ratio.

Real-world exampleGeneral Electric executed a 1-for-8 reverse split in 2021; Citigroup executed a 1-for-10 reverse split in 2011 following its post-financial-crisis share count.

Voluntary

Rights Issue

RHTS

The issuer offers existing shareholders the right — not the obligation — to subscribe for new shares, usually at a discount to market, in proportion to their holding. Raises fresh capital while preserving existing holders' pre-emption rights.

AnnouncementRatio & price set
Record Date
Ex-Rights Date
Subscription Deadline
Allotment / Listing

Mechanics & Entitlement

Holders have three real choices: subscribe (pay the price for new shares), sell the renounceable rights entitlement in the market, or let it lapse. Unsubscribed rights are often sold by the agent for non-participants (the "rump"), or simply lapse depending on the market.

Settlement & Accounting Impact

On subscription: cash debited, new (sometimes partly-paid) shares credited, often under a temporary ISIN until fully paid and merged into the parent line. If rights are sold instead, cash is credited and no new position is created.

Real-world exampleReliance Industries raised ₹53,124 crore via a rights issue in May 2020 — 1 new share for every 15 held at ₹1,257 per share, payable in instalments — one of the largest global rights issues that year.

Voluntary

Tender Offer / Share Buyback

TEND

The issuer (or occasionally a third party) offers to repurchase shares directly from holders at a fixed price, usually at a premium to market, for a limited window and often capped at a maximum quantity.

Announcement
Record DateEligibility
Tender Deadline
ProrationIf oversubscribed
Settlement Date

Mechanics & Entitlement

Holders elect how many shares to tender. If total tendered exceeds the offer's cap, shares are accepted pro-rata across all tendering holders; untendered or prorated-back shares remain outstanding, unaffected.

Settlement & Accounting Impact

Accepted shares debited from custody, cash credited at the tender price; any unaccepted portion simply remains in the account. Odd-lot holders are sometimes given priority to avoid leaving small residual positions.

Real-world exampleFixed-price and Dutch-auction tender buybacks are a standard capital-return tool for large-cap issuers alongside open-market repurchases; Dell's 2013 going-private deal used a tender/merger structure.

Voluntary

Dutch Auction Buyback

DTCH

A variant of the tender offer where the issuer specifies a price range rather than a single price; holders tender at whatever price within the range they'd accept, and the issuer sets the single "clearing price" that lets it repurchase the targeted amount.

AnnouncementPrice range & size
Election Deadline
Clearing Price Set
Settlement Date

Mechanics & Entitlement

Every accepted tender is paid the same clearing price, regardless of the price the holder specified, as long as their bid was at or below the clearing price. Oversubscription at the clearing price is prorated.

Settlement & Accounting Impact

Identical mechanics to a standard tender offer once the clearing price is set: shares debited, cash credited at the single clearing price.

Real-world exampleDutch-auction structures are used when an issuer wants price discovery from its own shareholder base rather than dictating a single premium upfront.

Mandatory

Merger — Cash Consideration

MRGR

Target shareholders receive a fixed cash amount per share and the target's shares cease to exist once the deal legally closes. No holder choice — a mandatory conversion of equity into cash.

AnnouncementDeal terms
ApprovalsShareholder & regulatory
Record Date
Effective/Closing Date
Payment Date

Mechanics & Entitlement

Entitlement = holding × agreed cash-per-share price. Any trade in the target still open on the effective date is transformed from a securities deliverable into the cash equivalent.

Settlement & Accounting Impact

Target shares extinguished (debited) from custody; cash credited at the agreed price; the security is delisted from its exchange.

Real-world examplePfizer's ~$43bn all-cash acquisition of Seagen closed in December 2023. Twitter's take-private deal (October 2022) was an all-cash merger at $54.20 per share.

Mandatory

Merger — Stock-for-Stock

MRGR

Target shareholders receive newly issued acquirer shares at a fixed exchange ratio (e.g., 0.6275 acquirer shares per target share) instead of cash. Also mandatory — every eligible holder is converted at the same ratio.

AnnouncementExchange ratio set
Approvals
Record Date
Effective Date
Delivery Date

Mechanics & Entitlement

New position = target holding × exchange ratio, generally rounded down with cash-in-lieu for fractions.

Settlement & Accounting Impact

Target shares debited and extinguished; acquirer shares credited FoP; cost basis carries over from the old position, often tax-deferred in a genuine share-for-share reorganisation, subject to jurisdiction.

Real-world exampleLarge-cap combinations are frequently structured as pure stock swaps to preserve both companies' balance sheets and give target shareholders continued upside in the combined entity.

Mandatory with Choice

Merger — Cash-or-Stock Election

MRGR

Target shareholders may elect cash, acquirer stock, or a mix, subject to an overall proration mechanism that caps the total cash (or stock) the acquirer pays out across all shareholders combined.

Announcement
Election Deadline
Proration Calculated
Closing Date
Payment/Delivery

Mechanics & Entitlement

Because the aggregate cash/stock mix is fixed at deal level, an individual holder's election can be prorated if too many choose the same option — cash electors scaled back and topped up with stock, or vice versa. Non-electing holders receive a pre-set default mix.

Settlement & Accounting Impact

A composite of the cash-merger and stock-merger mechanics above, applied per the final prorated allocation once the election window closes.

Real-world exampleBroadcom's acquisition of VMware (closed November 2023) let VMware holders elect $142.50 cash or a fixed ratio of Broadcom shares per share, prorated to keep the overall consideration roughly half cash, half stock.

Mandatory

Spin-off

SOFF

A parent company distributes shares of a subsidiary ("spinco") pro-rata to its existing shareholders, creating a new, independently listed company. Economically similar to a stock dividend, but the distributed security is a different, newly listed entity.

Announcement
Record Date
Distribution/Ex-Date
Spinco Trades Independently

Mechanics & Entitlement

Distribution ratio (e.g., 1 spinco share for every 4 parent shares) is fixed by the parent's board. No cash changes hands; the parent's price is marked down on ex-date to reflect the value distributed.

Settlement & Accounting Impact

A new position (in the spinco, under its own ISIN) is credited FoP to the same account; the parent's cost basis is split between parent and spinco shares based on their relative fair values at distribution — a genuinely fiddly tax-lot exercise.

Real-world exampleGeneral Electric spun off GE HealthCare in January 2023, then split its remaining businesses into GE Aerospace and GE Vernova in April 2024 — one issuer running the mechanic twice in under two years.

Voluntary

Exchange Offer

EXOF

Holders are invited to voluntarily exchange their existing security for a different one — new shares of a related issuer, a new bond with different terms, or a mix — commonly used in split-offs, debt exchanges, or restructurings.

AnnouncementExchange terms
Election Deadline
ProrationIf oversubscribed
Settlement Date

Mechanics & Entitlement

The holder chooses whether to tender their existing security into the offer; if capped and oversubscribed, accepted amounts are prorated exactly as in a tender offer.

Settlement & Accounting Impact

Old security debited, new security (or cash/mixed consideration) credited for the accepted portion; anything not tendered or not accepted remains unchanged in the original security.

Real-world exampleJohnson & Johnson completed the separation of its remaining Kenvue stake in August 2023 via a split-off exchange offer — J&J shareholders could voluntarily swap J&J shares for Kenvue shares at a discount.

Voluntary

Warrant Exercise

EXWA

A warrant gives its holder the right to buy the underlying share at a fixed strike price before expiry. Exercise is entirely at the holder's discretion — economically like a call option, but warrants are issued directly by the company (dilutive) rather than traded as standardised derivatives.

Issuance
Exercise Window Opens
Exercise Deadline/Expiry
Settlement Date

Mechanics & Entitlement

Holder pays the strike price per warrant exercised; new shares are issued by the company (dilutive), unlike an exchange-traded option settled between existing market participants.

Settlement & Accounting Impact

Cash debited (strike price × warrants exercised), new shares credited FoP; unexercised, out-of-the-money warrants simply lapse worthless at expiry.

Real-world exampleSPAC (special-purpose acquisition company) warrants are a high-volume, retail-heavy example of EXWA processing — holders weigh exercising against the current share price ahead of expiry.

Mandatory

Delisting & Name / Ticker Change

DLST / CHAN

Delisting removes a security from an exchange (voluntarily, by regulatory action, or following a merger); a name or ticker change (CHAN) simply updates identifying information with no economic effect on the holding.

Announcement
Effective Date

Mechanics & Entitlement

Ticker/name change: position is entirely unaffected — only static data updates across custody and trading systems. Delisting following a merger: closed out through the merger's own settlement, not through DLST alone.

Settlement & Accounting Impact

Name/ticker change — no cash or position movement, purely a static-data update. Standalone delisting (e.g., regulatory) — no automatic entitlement; impact is on liquidity and valuation, not settlement.

Real-world exampleA company rebranding its legal name and ticker triggers a CHAN event across every custodian's static data with zero cash or position impact — the clearest example of a purely informational corporate action.

Voluntary

AGM / EGM Voting

MEET

Not a movement of cash or securities at all — a governance event. Shareholders are notified of an Annual or Extraordinary General Meeting and invited to vote (in person, by proxy, or electronically) on resolutions such as director elections, executive pay, or approving a merger.

Meeting Notice
Voting Record Date
Proxy Deadline
Meeting Date
Results Announced

Mechanics & Entitlement

Only holders as of the voting record date are eligible; custodians pass voting rights down to beneficial owners and aggregate instructions back up as a single omnibus vote at the meeting.

Settlement & Accounting Impact

No cash or securities movement whatsoever — MEET is purely an instruction-and-reporting workflow, still handled through the same MT564/565/567 message family.

Real-world exampleA merger's shareholder-approval vote is itself a MEET event that must pass before the underlying MRGR event can proceed to its effective date — procedurally linked, operationally distinct.

Mandatory

Liquidation

LIQU

The company is wound up — assets sold, liabilities settled, and any residual value distributed to shareholders (who rank behind creditors and preferred holders) in one or more liquidating distributions. In a full liquidation, the equity is ultimately extinguished.

Liquidation Approved
Record Date(s)Per distribution
Distribution Date(s)
Final Distribution / Cancellation

Mechanics & Entitlement

There may be one final payment or several interim liquidating distributions as assets are realised over time; the per-share amount is rarely known precisely in advance.

Settlement & Accounting Impact

Cash (occasionally in-kind assets) credited to holders as distributions occur; the equity position is debited to zero once the final distribution is paid and the security is cancelled.

Real-world exampleCommon outcome for closed-end funds and distressed/bankrupt issuers once a court-approved winding-up plan is in place; equity holders typically recover little or nothing if the company was insolvent, since creditors are paid first.

Part II — Fixed Income Corporate Actions

12 events
Mandatory

Coupon / Interest Payment

INTR

Periodic interest payment on a bond to holders of record, per the instrument's coupon rate and payment frequency. Fixed income's equivalent of a cash dividend, and similarly the highest-volume FI event.

Accrual Period
Record Date
Payment Date

Mechanics & Entitlement

Entitlement = face value held × coupon rate × (days in period ÷ day-count convention, e.g. 30/360 or Actual/Actual). Accrued interest is settled between buyer and seller on every trade — the buyer pays the seller accrued interest at trade settlement, then collects the full coupon at payment date.

Settlement & Accounting Impact

Cash credited at the coupon rate on face value held at record date. For floating-rate notes, the applicable reference-rate reset for the period is applied first.

Real-world exampleA semi-annual USD corporate bond paying a fixed coupon is one of the highest-STP events in fixed income — largely automated end to end since the entitlement is pure arithmetic on face value.

Mandatory

Final Maturity / Redemption

REDM

The bond reaches its stated maturity date and the issuer repays full face value to holders of record, alongside the final coupon; the security is then cancelled. Used only for redemption on the original schedule, not an early call/put option.

Final Coupon / Record Date
Maturity / Redemption Date

Mechanics & Entitlement

Entitlement = face value held × 100% (par) + final coupon accrued. No election — every holder is redeemed identically.

Settlement & Accounting Impact

Cash credited for principal + final interest; the bond position is debited to zero and the ISIN cancelled/deactivated.

Real-world exampleGovernment and corporate bonds redeeming at scheduled maturity are the cleanest, most predictable fixed income event — the date and amount have been known since issuance.

Mandatory

Full Call

MCAL

The issuer exercises its right (per the call schedule/indenture) to redeem an entire outstanding issue early, usually at a pre-set call price (often par, sometimes at a small premium). Common when falling rates let the issuer refinance more cheaply.

Call AnnouncementOften 30 days' notice
Record Date
Call / Redemption Date

Mechanics & Entitlement

Entitlement = face value held × call price + accrued interest to the call date. From announcement, the bond's yield-to-call becomes the relevant metric rather than yield-to-maturity.

Settlement & Accounting Impact

Cash credited at the call price; position debited to zero; the bond stops trading once formally called.

Real-world exampleA wave of corporate bond calls typically follows a rate-cutting cycle, as issuers refinance high-coupon debt issued when rates were higher.

Mandatory

Partial Call / Paydown

PCAL / PRED

Only a portion of the outstanding issue is redeemed early — common for asset-backed and mortgage-backed securities (ABS/MBS) where loan prepayments flow through as principal paydowns. PCAL reduces face value per unit; PRED redeems a portion without reducing nominal value (via a lottery-style drawing instead).

Factor Update
Record Date
Payment DateOften monthly

Mechanics & Entitlement

Entitlement = face value held × change in pool factor × par — a pro-rata slice of the paydown; the remaining position's face value is reduced accordingly (PCAL) rather than the number of bonds held.

Settlement & Accounting Impact

Cash principal paydown credited; outstanding face value is written down in the ledger to reflect the new pool factor — a step easy to miss, and a classic source of income breaks if the factor isn't updated before the next coupon is calculated.

Real-world exampleMortgage-backed securities pay down principal monthly as underlying homeowners prepay or refinance — the "pool factor" published each month is exactly what drives this paydown.

Voluntary

Put Option / Puttable Bond

Put Redemption

Gives the bondholder — not the issuer — the right to demand early redemption at a pre-set price on specified put date(s), protecting the holder if rates rise or credit quality deteriorates. The mirror image of a callable bond.

Put Window Opens
Election Deadline
Put Settlement Date

Mechanics & Entitlement

Holder decides whether to exercise; if not exercised, the bond simply continues to its next put date or maturity unchanged.

Settlement & Accounting Impact

For exercising holders: cash credited at the put price + accrued interest, position debited. Non-exercising holders see no change at all.

Real-world examplePuttable structured notes and some sovereign/agency bonds include periodic put windows, giving institutional holders an exit valve without selling in the secondary market.

Mandatory

Sinking Fund / Drawing

DRAW

The issuer is contractually required to retire a portion of an issue periodically ahead of final maturity. Which specific certificates are redeemed is typically decided by a random lottery drawing among all outstanding certificates.

Drawing DateLottery held
Notification
Redemption / Payment Date

Mechanics & Entitlement

A subset of outstanding certificates is selected by lottery for full or partial redemption at the sinking-fund price (usually par); all other holders are unaffected until the next drawing.

Settlement & Accounting Impact

For drawn holders: cash credited at the sinking price, position reduced/cancelled for the drawn certificates. Undrawn holders continue to hold and accrue interest normally.

Real-world exampleSinking-fund drawings remain common in markets that still use physical/bearer certificates and in structured or municipal bond programmes with mandatory periodic retirement schedules.

Voluntary

Convertible Bond Conversion

CONV

Conversion of a convertible bond (or convertible preferred share) into common equity of the issuer, at a pre-stated conversion price/ratio, at the holder's election — some instruments also carry an issuer-forced conversion clause above a trigger price.

Conversion Window Opens
Election Deadline
Conversion / Delivery Date

Mechanics & Entitlement

Shares received = face value held ÷ conversion price (or face value × conversion ratio). Economically rational mainly when the equity's market value exceeds the "as-converted" bond value — which is why conversion volume clusters around rallies in the underlying stock.

Settlement & Accounting Impact

Bond position debited/cancelled for the converted portion; equity shares credited FoP. Accrued-interest treatment on conversion is defined by the indenture (sometimes forfeited, sometimes paid).

Real-world exampleConvertible note holders in high-growth technology names have historically converted into equity once the underlying share price rallied well above the conversion price, locking in the upside the bond was designed to offer.

Voluntary

Consent Solicitation

CONS

The issuer (or a third party) asks bondholders to vote to approve a change to the bond's terms — waiving a covenant, extending maturity, or approving a restructuring — usually with a one-off consent fee for holders voting in favour before the deadline.

Solicitation Launch
Consent Deadline
Results Announced
Consent Fee PaidIf applicable

Mechanics & Entitlement

Holder decides whether to grant consent; a required threshold (e.g., majority or super-majority of outstanding face value) must be reached for the amendment to bind all holders under most indentures.

Settlement & Accounting Impact

No principal/security movement — a voting event with an optional cash consent-fee payment to participating, favourable voters.

Real-world exampleConsent solicitations commonly precede a bond exchange offer, where the issuer first needs bondholder approval to waive protective covenants before executing the broader restructuring.

Voluntary

Exchange Offer / Debt Restructuring

EXOF

Bondholders are invited to voluntarily exchange existing notes for new notes with different terms — lower principal, extended maturity, different coupon, or equity — typically used in distressed-debt restructurings as an alternative to formal bankruptcy.

AnnouncementExchange terms
Election Deadline
Settlement Date

Mechanics & Entitlement

Holder decides whether to tender into the exchange; often paired with a simultaneous consent solicitation to amend the old bond's covenants ("exit consents"), making non-participation less attractive.

Settlement & Accounting Impact

Old bond debited, new instrument (bond, mixed cash/bond, or equity) credited for the accepted/tendered portion.

Real-world exampleDistressed issuers frequently combine debt exchange offers with exit consents to restructure outside formal bankruptcy, since reaching the participation threshold amends the old bond's terms even for holdout creditors.

Mandatory

Interest Rate Reset (Floating Rate Note)

INTR (rate reset)

A floating-rate note's coupon resets periodically (e.g., quarterly) to a new reference rate plus a fixed spread — historically LIBOR-based, now predominantly SOFR / €STR / SONIA-based following the post-2021 benchmark transition.

Reset / Fixing Date
New Rate Published
Next Coupon Period

Mechanics & Entitlement

New coupon rate = reference rate (as fixed on reset date) + fixed spread. No holder action — the new rate simply applies automatically to the next coupon calculation.

Settlement & Accounting Impact

No cash movement at reset itself; it changes the entitlement calculation for the next coupon (INTR) event.

Real-world exampleThe 2021–2023 industry-wide LIBOR-to-SOFR transition required re-papering millions of legacy floating-rate instruments' reset mechanics — a landmark, industry-scale project for fixed income Ops teams.

Mandatory

Redenomination

REDO

The currency or unit denomination of a security is changed — historically most associated with legacy European currencies (franc, mark, lira) converting into the euro, or more generally when face-value denominations are updated for market convention.

Announcement
Redenomination / Effective Date

Mechanics & Entitlement

Face value is recalculated at the fixed conversion rate; units held are generally unchanged, but the currency and/or minimum denomination of the security is updated.

Settlement & Accounting Impact

No cash movement; static data (currency, face-value denomination) is updated across custody records.

Real-world exampleBonds originally issued in legacy currencies like the Deutsche Mark or French Franc were redenominated into euro as those currencies were phased out between 1999 and 2002.

Mandatory

Default / Bankruptcy

Status Event

The issuer fails to make a scheduled interest or principal payment, or files for bankruptcy protection, triggering a change in the security's legal and trading status. Not itself a cash/security movement, but the trigger for a cascade of subsequent events.

Missed Payment / Filing
Trading Status Update
Subsequent Restructuring Events

Mechanics & Entitlement

The bond typically continues to trade "flat" (without accrued interest changing hands) once in default, since future coupons are no longer assured. Recovery, if any, ultimately comes through a court-supervised or negotiated restructuring.

Settlement & Accounting Impact

No automatic cash/security movement at default itself; Ops flags the position, stops accruing interest income in client statements per accounting policy, and monitors for the restructuring event that follows.

Real-world exampleHigh-yield issuers that miss a coupon payment typically enter a restructuring process — often resulting in an exchange offer converting bondholders into a mix of new debt and/or equity in the reorganised company.

Part III — Fund Corporate Actions

9 events
Mandatory

Income / Dividend Distribution

DVCA (fund context)

A mutual fund, ETF, or closed-end fund distributes accumulated income (interest, dividends received by the fund) to unit/shareholders in proportion to units held, typically on a set schedule per the fund's distribution policy.

Declaration Date
Record Date
Ex-Distribution Date
Payment Date

Mechanics & Entitlement

Entitlement = units held × per-unit distribution rate. NAV drops by the per-unit distribution amount on ex-date, since the distributed income leaves the fund's assets.

Settlement & Accounting Impact

Cash credited (or automatically reinvested if a growth/DRIP option is selected — see below); no change to units held for cash-distribution investors.

Real-world exampleDebt/income mutual funds often distribute monthly or quarterly; equity growth funds may distribute annually or not at all, retaining income within NAV instead.

Mandatory

Capital Gains Distribution

CAPG

Distribution of realised profits from the fund's sale of portfolio securities during the year, passed through to unit-holders — common at year-end for open-end mutual funds in jurisdictions where funds must distribute realised gains to retain pass-through tax status.

Estimate / Announcement
Record Date
Ex-Date
Payment Date

Mechanics & Entitlement

Entitlement = units held on record date × per-unit capital gains rate, split between short-term and long-term gains for tax reporting in relevant markets. NAV is reduced by the distribution amount on ex-date.

Settlement & Accounting Impact

Cash credited (or reinvested); a taxable event for the investor even if reinvested, since the gain was realised inside the fund regardless of how long the investor personally held their units.

Real-world exampleUS mutual funds commonly declare capital gains distributions in November/December each year — creating a "buying a distribution" trap for investors who purchase shortly before record date and immediately owe tax on gains they didn't economically benefit from.

Mandatory with Choice

Dividend Reinvestment (Growth Option)

DRIP

At subscription, most funds let an investor choose a "growth/accumulation" option (income retained/reinvested as new units) or an "income/distribution" option (income paid as cash) — the same choice-driven mechanic as an equity DRIP, but usually elected once at account opening.

Follows the underlying distribution's own timeline

Mechanics & Entitlement

If reinvestment is elected, additional units = distribution amount ÷ NAV per unit on the reinvestment date (often ex-date NAV, sometimes with no sales load).

Settlement & Accounting Impact

Growth option: new units credited FoP, no cash movement visible to the investor. Income option: cash credited exactly as a standard distribution.

Real-world exampleNearly all fund platforms default retail investors into "growth"/accumulation share classes unless income is explicitly requested, since most retail investors are accumulating rather than drawing income.

Mandatory

Accumulation Units (Deemed Distribution)

INFO

In an accumulation share class, income accrued during the period is retained within the fund rather than paid out — but for tax purposes in several jurisdictions (notably the UK), retained income is still treated as if distributed to investors, creating a tax liability with no matching cash payment.

Accounting Period End
Deemed Distribution DateNo cash moves

Mechanics & Entitlement

No unit or cash movement at all; NAV simply reflects the retained income already. Only a tax-reporting entry is generated for the investor.

Settlement & Accounting Impact

Nothing settles — this is purely a tax/reporting corporate action, one of the few events with zero balance-sheet impact anywhere in the chain.

Real-world exampleUK "accumulation" (Acc) share classes are the clearest case: investors must report and pay tax on income they never actually received in cash, purely because it was retained and reflected in a higher NAV.

Mandatory with Choice

Fund Merger / Scheme Amalgamation

MRGR

Two funds (or two share classes) are combined into one, usually to eliminate an overlapping or sub-scale scheme. Unlike a corporate merger, unit-holders in the absorbed fund are typically given a window to redeem out for cash instead of rolling into the surviving fund.

Announcement
Opt-out / Redemption Window
Merger Effective Date
New Units Allotted

Mechanics & Entitlement

Holders who don't opt out are converted into units of the surviving fund at the relevant NAV-based exchange ratio on the effective date; holders who opt out simply redeem at NAV as a normal transaction.

Settlement & Accounting Impact

Absorbed fund's units debited (cancelled); surviving fund's units credited FoP at the calculated ratio, with cost basis carried forward where the merger qualifies as a tax-deferred reorganisation.

Real-world exampleFollowing SEBI's mutual fund re-categorisation norms, many Indian asset managers merged overlapping schemes into a single scheme per category, giving unit-holders an exit option before the merger date.

Mandatory

Fund Liquidation / Winding-up

LIQU

The fund is closed and its remaining assets sold and distributed to unit-holders — used when a scheme is sub-scale, its strategy is discontinued, or (for closed-end funds/trusts) its term expires.

Wind-up Announced
Trading Suspended
Final NAV Struck
Final Distribution Date

Mechanics & Entitlement

Entitlement = units held × final NAV per unit once all portfolio assets are liquidated (or, rarely, transferred in-kind) and liabilities settled.

Settlement & Accounting Impact

Cash credited for the final NAV; the unit position is debited to zero and the fund's registration is deactivated.

Real-world exampleSub-scale niche or thematic ETFs are frequently wound up by their sponsor when assets under management fall below a viable threshold, returning final NAV to holders in cash.

Voluntary

Share Class Conversion / Switch

Class Switch

An investor (or the fund itself, in a forced conversion) moves a holding from one share class of the same fund to another — e.g., retail to institutional, or income to growth — usually to access a lower expense ratio at a higher investment threshold.

Election or Announcement
Conversion Date

Mechanics & Entitlement

New units = value of old holding at NAV ÷ new class's NAV per unit; economically neutral at the moment of conversion, but the ongoing expense ratio changes going forward.

Settlement & Accounting Impact

Old class units debited, new class units credited FoP within the same fund — no cash movement, no capital-gains/redemption event in most jurisdictions since it's the same underlying fund.

Real-world exampleInstitutional platforms routinely auto-convert investors from a retail share class into a lower-cost institutional class once their holding crosses a minimum-investment threshold.

Mandatory

Bonus Units / Unit Split

BONU / SPLF

Additional units issued free of payment to existing unit-holders in proportion to their holding (bonus units), or existing units subdivided into a larger number at a proportionally lower NAV (unit split) — both leave total holding value unchanged, purely changing unit count and per-unit NAV.

Announcement
Record Date
Credit / Split Date

Mechanics & Entitlement

New unit count = old units × (1 + bonus ratio), or × split ratio for a straight split; NAV per unit adjusted down by the same factor.

Settlement & Accounting Impact

Free-of-payment unit credit; no cash movement; average cost per unit recalculated across the new, larger unit count.

Real-world exampleFund houses occasionally use unit splits to bring a high-NAV legacy scheme's per-unit price back down to a more retail-friendly level, without changing any investor's total holding value.

Voluntary

Rights Issue — Closed-End Funds

RHTS

A closed-end fund (which, unlike an open-end mutual fund, has a fixed share count and trades on an exchange like a company) can raise additional capital via a rights issue to existing shareholders, exactly as an operating company would.

Announcement
Record Date
Ex-Rights Date
Subscription Deadline
Allotment Date

Mechanics & Entitlement

Identical mechanics to an equity rights issue — subscribe, sell the rights, or let them lapse — since a closed-end fund's shares trade and settle exactly like ordinary equity.

Settlement & Accounting Impact

Cash debited and new shares credited on subscription; shares are often issued at a discount to NAV to incentivise take-up, which can dilute non-participating holders' NAV per share.

Real-world exampleClosed-end funds trading at a premium to NAV sometimes use rights issues to raise growth capital, since the premium makes new share issuance accretive rather than dilutive to existing holders.

Reference

tables & glossary

Comparison tables

The classification table (Mandatory / Voluntary / Mandatory with Choice) is covered in Classification above. Two more comparisons worth having cold for an interview:

Cash event vs. securities/stock event
AspectCash Event (cash dividend, coupon, cash merger)Securities Event (bonus issue, split, stock merger)
Account impactedCash/nostro account creditedCustody/position account increased, reduced, or converted
Valuation impactPrice marked down by the cash amount on ex-date; no other adjustmentNew/additional securities require a recalculated average cost per unit
Settlement mechanismCash payment referencing the corporate action eventFree-of-payment (FoP) securities movement or re-registration
Tax treatmentOften withholding tax applies at sourceUsually tax-deferred until eventual sale (jurisdiction dependent)
Equity vs. fixed income vs. funds — quick reference
AspectEquityFixed IncomeFunds
Typical triggerBoard/company decisionBond indenture terms or issuer electionAMC/trustee decision, scheme rules
Common eventsDividend, split, merger, rights, buybackCoupon, call, put, maturity, conversionDistribution, NAV rebasing, scheme merger
Key reference entityRegistrar & stock exchangePaying/fiscal agent & trusteeRegistrar & Transfer Agent (RTA), trustee
Typical CAEV familyDVCA, BONU, SPLF, MRGR, RHTS, TENDINTR, REDM, MCAL, PCAL, CONV, CONSDVCA/CAPG, MRGR, LIQU
Settlement venueExchange CSD (DTC / Euroclear / NSDL-CDSL)Bond CSD / ICSD (Euroclear / Clearstream) or localFund registrar / transfer-agency platform

Notable real deals, for quick recall

Concrete anchors are worth more in an interview than a memorised definition. These are real, verifiable examples worth having ready.

EventDealYearWhat happened
Forward SplitNvidia202410-for-1 forward split, effective 7 June 2024
Forward SplitAmazon202220-for-1 forward split, effective June 2022
Reverse SplitGeneral Electric20211-for-8 reverse split as part of a broader restructuring
Reverse SplitCitigroup20111-for-10 reverse split following the financial crisis
Rights IssueReliance Industries2020₹53,124 crore raised; 1 new share per 15 held at ₹1,257, payable in instalments
Spin-offGE HealthCare / GE Vernova & GE Aerospace2023 & 2024General Electric separated into three independent public companies in two stages
Exchange Offer / Split-offJohnson & Johnson → Kenvue2023J&J shareholders could voluntarily swap J&J shares for Kenvue shares at a discount
Cash MergerPfizer → Seagen2023~$43bn all-cash acquisition; Seagen delisted on close
Cash Merger (going-private)Twitter (Musk)2022All-cash take-private at $54.20 per share
Cash-or-Stock MergerBroadcom → VMware2023Holders elected $142.50 cash or a fixed Broadcom share ratio, prorated toward a ~50/50 mix

Glossary

ISIN

International Securities Identification Number — 12-character alphanumeric code uniquely identifying a security globally (ISO 6166).

CUSIP

9-character identifier used for securities in the US and Canada.

SEDOL

7-character UK identifier (Stock Exchange Daily Official List), used on the LSE and as a component of many ISINs.

Record Date

The snapshot date used to determine which holders are entitled to a corporate action benefit.

Ex-Date

First trading day a security trades without the entitlement attached; price is typically marked down on this date.

Payment / Effective Date

Date cash/securities are actually delivered, or a restructuring legally takes effect.

Entitlement

The cash and/or securities a holder is due, computed as position × rate/ratio.

CAEV

ISO 15022/20022 "Corporate Action Event Indicator" — the 4-letter code identifying the event type (e.g. DVCA, MRGR).

Golden Record

The validated master version of an event's terms, cross-checked across multiple data sources before being sent to clients.

STP

Straight-Through-Processing — the percentage of notifications/instructions processed without manual intervention.

Due Bill

A tracking mechanism ensuring a buyer who traded before ex-date but hasn't settled still receives the entitlement (or the reverse), by attaching or stripping it from delivery.

Market Claim

Automatic compensating transaction between counterparties when a trade settles late across an ex/record date, correcting who receives the entitlement.

Transformation

Automatic conversion of a pending trade's deliverable when the underlying security changes due to a mandatory event.

Buyer Protection

A formal mechanism letting a buyer whose trade hasn't settled still assert an election right on a voluntary event.

Proration

Reducing tendered/elected quantities pro-rata when an offer is oversubscribed relative to its cap.

Odd Lot

A holding below the standard trading unit (e.g., under 100 shares in the US), sometimes given priority tender treatment.

Fractional Entitlement

A non-whole-share/unit remainder from a ratio-based event, usually paid out as cash-in-lieu.

Rump

The unsubscribed portion of a rights issue, typically sold in the market with proceeds passed to non-participating holders.

Pari-Passu

New securities rank equally with existing ones for dividend/rights purposes.

Withholding Tax (WHT)

Tax deducted at source on dividend/interest income, based on the investor's tax residency and treaty relief documentation.

DTC / Euroclear / Clearstream

Major (I)CSDs — DTC for US equities and corporate debt, Euroclear & Clearstream as the two main international/Eurobond ICSDs.

NSDL / CDSL

India's two securities depositories, where dematerialised Indian equities and bonds are held.

Registrar & Transfer Agent (RTA)

Entity maintaining the register of holders and processing entitlements on the issuer's behalf.

Paying / Fiscal Agent

Bank appointed to handle coupon/redemption cash flows for a bond issue.

Custodian / Sub-custodian

Institutions holding securities on behalf of clients; sub-custodians are local agents in a given market for a global custodian.

Street Name

Securities held in the name of a broker/custodian/nominee rather than the beneficial owner directly.

NAV

Net Asset Value — the per-unit value of a fund.

DRIP

Dividend Reinvestment Plan — automatic reinvestment of a cash distribution into additional units/shares.

Book Closure

A period during which the register/transfer books are closed to determine entitlement — an older mechanism, still referenced in some markets alongside a single record date.

Free of Payment (FoP)

A securities settlement with no corresponding cash movement.

Delivery versus Payment (DvP)

Settlement where securities and cash move simultaneously and conditionally on each other.