Volume

Volume represents the total quantity of shares or contracts that change hands during a given time period. It is distinct from turnover (which measures value in INR) and from open interest (which applies to derivatives and measures outstanding contracts). Volume is a confirmation tool — it validates or questions the significance of price movements.

The volume-price relationship follows well-established principles. Rising prices on rising volume confirm an uptrend — buyers are actively driving the market higher. Rising prices on declining volume warn that the rally may be losing steam. Falling prices on rising volume confirm a downtrend — sellers are in control. Falling prices on low volume suggest the selling may be exhausted.

On NSE, volume data is available in real time for every security. The exchange also publishes aggregate statistics: total market volume, top traded stocks by quantity and value, and delivery versus intraday volume breakdown. For Indian traders, the delivery percentage is a particularly useful metric — high delivery percentage (above 50-60%) on an up day indicates genuine accumulation rather than speculative intraday activity.

Volume spikes deserve special attention. A sudden surge to 3-5x average daily volume often signals an important event: block deal, institutional entry/exit, insider buying/selling, or a response to earnings/news. SEBI requires disclosure of bulk deals (more than 0.5% of outstanding shares) and block deals (minimum INR 10 crore through the block deal window), providing transparency around large volume events.

In the F&O segment, volume combined with open interest provides richer information. Rising volume with rising open interest means new positions are being created (fresh money entering). Rising volume with falling open interest means existing positions are being closed (positions unwinding). This distinction helps traders gauge whether a price move has staying power or is merely position closure.