: For high-volume stocks (like S&P 500 companies), your order is matched with a buyer or seller almost immediately. For "penny stocks" or illiquid companies, it can take minutes, hours, or even days to find a match. 2. Settlement: The "Business Day" Timeline

: India also moved to a T+1 settlement system in 2023 for all listed scrips. 3. Regulatory and Account Limits

For most retail investors, you can buy and sell a stock almost . While you can execute a trade in fractions of a second, there are two distinct timelines: execution (the actual trade) and settlement (when ownership and funds officially change hands). 1. Execution: The "Seconds" Timeline

: These prioritize speed and typically fill in milliseconds to seconds during regular market hours.

: You typically cannot withdraw sale proceeds to your bank until the trade has settled (T+1).

Even if the trade happens in seconds, the legal transfer follows a different clock:

: As of 2024, most U.S. stocks follow a T+1 cycle , meaning the trade settles one business day after it occurs. If you sell on a Monday, the funds officially settle on Tuesday.

In a liquid market with popular stocks, buying and selling happens nearly instantaneously: