What is book closure (record date)?
Book closure is the cut-off date a company uses to finalise its register of shareholders, determining who is entitled to a dividend or other corporate action.
Book closure is the period during which a company finalises its register of shareholders to decide who is entitled to an upcoming benefit — a dividend, bonus shares, right shares, or a vote at a meeting. The associated cut-off is often called the record date: whoever appears on the company's books as a shareholder on that date receives the entitlement.
Think of it as taking a snapshot. To distribute a dividend fairly, the company must, at some moment, freeze the list of owners. Anyone holding shares at that point qualifies; anyone who buys afterwards does not get that particular payout (they buy the stock ex-entitlement).
The timing interacts with T+2 settlement, and this trips up many investors. Because a trade takes two business days to settle, you must buy the shares a couple of business days before the book closure so the transfer completes and your name is on the register in time. Buy too late — on or after the cut-off — and although you own the shares, the settlement lands after the snapshot, so you miss the dividend or bonus. The seller who held through the record date keeps it.
A few practical points:
- Ex-date behaviour. Around the time a stock goes "ex-dividend" or "ex-bonus," its price typically adjusts down by roughly the value of the entitlement, because that value is leaving the company or being spread over more shares. You are not losing out — the price simply reflects that the benefit now belongs to existing holders. - No trading benefit from last-minute buying. Buying purely to "grab" a dividend just before book closure rarely creates free value, because the price drop on the ex-date offsets the cash you receive (and there may be tax on the dividend). - Multiple actions. A single book closure can cover several entitlements announced together, such as a cash dividend plus a bonus issue.
For investors, the lesson is about timing and eligibility. If you specifically want to receive an announced dividend or bonus, check the book closure date and ensure your purchase settles before it. If you are buying for the long term, book closure matters less — you will hold through many of them — but it still explains the small price adjustments you will see around entitlement dates.
In short, book closure is the company's official cut-off for "who counts" — the moment that turns ownership into entitlement.