A dividend announcement usually includes several dates: declaration, ex-dividend, record and payment. The ex-dividend date is the key market date for determining whether a buyer receives the upcoming distribution under the applicable settlement rules.
Investors should always check the exchange and company notice because settlement conventions can change and special distributions can have different treatment.
Ex-date and record date are related but not identical
The record date is when the company identifies shareholders entitled to the distribution. The ex-date reflects market settlement mechanics so trades are treated consistently around that record date.
This is why simply looking at the payment date does not tell an investor when shares must be purchased.
The share price can adjust
When a company pays cash out, that cash leaves the corporate balance sheet. All else equal, the market value available to shareholders is lower by the amount distributed, although ordinary market movements can easily overwhelm the mechanical effect on any given day.
That is why buying solely to capture a dividend is not automatically profitable.
Use the date as an entitlement rule, not a strategy
The ex-date is useful for understanding cash-flow timing and reconciling brokerage statements. Investment decisions still depend on valuation, tax, business quality and the expected total return.
GMR's dividend tools model income over time but do not assume dividend capture creates an extra return.