The Short Version
When a company fixes a record date (or book closure) for a corporate action, the exchange also blocks out a matching 'no-delivery period' around it for that specific security. Trading continues as normal during this window, but no actual delivery/settlement of shares takes place — trades executed during the no-delivery period are simply carried forward and settled once the period ends. This exists purely to keep delivery timing lined up correctly with who is entitled to the corporate action benefit as of the record date.
Explain It Like I'm 10
Picture a relay race where runners keep running the whole time (trading never stops), but for a short stretch, the officials pause handing out the baton (delivery/settlement) just to make sure everyone's position is correctly counted for a specific award being given out at a specific moment (the record date). Once that moment has passed and the award list is locked in, the baton-passing (settlement) resumes normally, and everything that was paused gets caught up.
Step-by-Step Example
- 1 A company sets a record date of the 20th for a bonus issue, so the exchange fixes a no-delivery period from the 18th to the 20th for that stock.
- 2 On the 19th (inside the no-delivery period), you buy shares of that stock — the trade executes normally.
- 3 However, delivery/settlement of that specific trade doesn't happen on its usual T+1 schedule — it's held until the no-delivery period ends.
- 4 Once the no-delivery period closes after the 20th, your trade settles normally and shares move into your demat account.
- 5 This pause exists purely so the exchange doesn't have to untangle who technically owned the shares at the exact record-date instant while settlement was mid-flight.
Quick Recap
- ✓ Trading is not paused during a no-delivery period — only the physical/electronic settlement of trades is paused.
- ✓ It applies to a single security around its own corporate action, not to the whole market.
- ✓ It prevents a mismatch where a trade settles at the 'wrong' moment relative to the record date, which could otherwise cause confusion over who is entitled to the benefit.
- ✓ The exchange announces the exact no-delivery dates alongside the record date/book closure for that stock.