Indices are not directly traded on exchanges, so there is no official “index volume.” To make index charts meaningful, FYERS shows a synthetic Volume that reflects the combined trading activity of all stocks that make up the index.
1) For each chart interval (1 minute, 5 minutes, daily, etc.), FYERS reads the exchange-reported traded volume of every current constituent stock of the index for that same interval.
2) These stock volumes are added together.
3) The total is plotted as the index Volume for that interval in the Volume pane below the price chart.
On a BANK NIFTY chart for the 9:15–9:20 candle:
• Each BANK NIFTY constituent has a traded volume for that 5-minute period.
• FYERS adds those 5-minute volumes across all constituents.
• The combined total is shown as the Volume for the BANK NIFTY 9:15–9:20 candle.
The same logic applies to other timeframes: each bar’s Volume equals the total traded shares of all constituents during that bar’s time range.
• Not futures volume: This is not the volume of index futures contracts.
• Not turnover: Values represent number of shares traded, not rupee value.
• Rebalancing: When index constituents change, the updated list is applied from the effective date.
• Non-trading stocks: If a constituent does not trade in an interval, its contribution is zero for that bar.
• Corporate actions: Splits/bonuses are reflected at the stock level via exchange-reported volumes.
• Index Volume is available from 01 July 2025 onward.
• For dates prior to this, index Volume is not displayed (the pane may appear empty or show zero depending on platform behavior).
| Scenario | Solution |
|---|---|
| I view dates before 01 July 2025 | Index Volume is not shown (pane may be empty or zero). |
| An index is rebalanced | From the effective date, the sum uses the new list of constituents. |
| A constituent is halted or does not trade during a bar | Its contribution is zero; other constituents still sum up. |
| The Volume looks unusually large | Values represent the total shares across all constituents, not a single stock. |
Last updated: 26 Sep 2025