Rolling Settlement is a system where trades in the stock market are settled within a fixed number of days (T+n) after the transaction date.
In a Rolling Settlement system, each trade is settled individually based on its trade date, rather than being grouped together.
For example, if you buy shares today (T day), they will be delivered and payment settled after a fixed period such as T+1 (next working day).
In India, stock market settlements are handled through exchanges like the National Stock Exchange and Bombay Stock Exchange under regulation of the Securities and Exchange Board of India.
"If you buy shares on Monday (T), they are credited to your Demat account by Tuesday (T+1)."