Top gainers today

The gain is the latest price minus the previous close, divided by the previous close. The previous close is the closing price of the last trading day. A share that opened higher and faded is ranked on where it trades now, not on its high.

Only companies with a market cap of ₹500 Cr or more are ranked. A small company's price can move 20% on a handful of trades, so smaller companies would fill the top of the list. They are left out of the ranking but still counted in the totals of shares that rose and fell. A company listed on both exchanges appears once, at its NSE price; companies listed only on BSE join with their closing prices.

The size switch follows the mutual fund convention: the 100 largest companies by average market cap over six months are large cap, the next 150 mid cap, and the rest small cap. The ranking is revised twice a year. Each view shows 30 companies.

Exchanges limit how far a share can move in a day. Most shares carry a band of 2%, 5%, 10% or 20% from the previous close, and the exchange can revise it. Shares with futures and options trading have no fixed band; their permitted range widens in steps during the day. A gain that reaches the band's limit is called an upper circuit.

Volume versus usual sets the day's share count against its average over the previous 50 sessions. Delivery is the share of the day's volume taken into investors' accounts instead of being bought and sold within the day. The page also ranks gainers over one month, three months, six months and one year.