How is the Volume for indices calculated in FYERS?
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.
How the calculation works
- 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.
- These stock volumes are added together.
- The total is plotted as the index Volume for that interval in the Volume pane below the price chart.
Example: 5-minute candle
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.
Key things to know
- 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.
Availability
- 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).
What if…
| Scenario | Outcome |
|---|
| 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
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