Why your gold ETF now opens with a call auction: SEBI's new ETF base price, dynamic price bands and close-out rules
Since Sept 7, 2026, SEBI rules anchor ETF prices to a T-1 VWAP base, start equity ETFs on a 10% dynamic band and gold and silver ETFs on 6%, and add a pre-open call auction.
If you hold a gold or silver ETF and placed an order before the bell this week, you may have noticed that your trade no longer behaves the way it did in August. Since September 7, 2026, every exchange traded fund in India trades under a new set of price-band rules laid down by the Securities and Exchange Board of India (SEBI) in circular HO/47/11/11(1)2026-MRD-POD3/I/13804/2026, dated June 15, 2026. The most visible change for commodity ETF holders is a pre-open call auction, but the base price, the width of the band and the close-out rules have all changed too. This pre-open note sets out what changed, how the new bands work with worked numbers, and what to keep an eye on at the open.
The original circular named September 1, 2026 as the effective date. SEBI then pushed that back by six days to September 7, 2026 through a second circular, HO/47/11/11(1)2026-MRD-POD3/I/19839/2026, dated August 28, 2026. Both circulars are published on the SEBI website, and the full text is the authoritative reference for anything not covered below.
Market Snapshot
This edition does not carry Nifty, Sensex or sectoral index levels: the editor-curated source for today's angle is the SEBI circular of June 15, 2026, and Oquilia does not publish index figures it cannot verify against its research feed. Instead, the snapshot below captures the 4 rule parameters that now govern how every ETF price is allowed to move during a session.
| Parameter | Old regime (until Sept 6, 2026) | New regime (from Sept 7, 2026) |
|---|---|---|
| Base price | T-2 day NAV | T-1 closing price (VWAP of last 30 minutes) |
| Fallback base price | Not applicable | Day's last traded price, then latest closing NAV |
| Equity and debt ETF band | Fixed 20% | Dynamic: starts at 10%, can flex up to 20% |
| Overnight and liquid ETF band | Fixed 5% | Fixed 5% (unchanged width) |
| Gold and silver ETF band | Fixed 20% | Starts at 6%, flexes in 3% steps, no cap |
| Commodity ETF pre-open | No call auction | Pre-open call auction, as for equities |
Why the base price matters
Under the old framework, an ETF's price band was anchored to a NAV that was 2 trading days old. On a day when gold had moved sharply overnight, the 20% band was centred on a price that could already be stale by a meaningful margin. The new base price is the T-1 closing price, defined as the volume-weighted average price (VWAP) of the last 30 minutes of the previous session. If an ETF did not trade enough to generate that figure, the exchange falls back first to the day's last traded price and then to the latest closing NAV.
A further change is scheduled: with effect from April 1, 2027, exchanges and asset management companies are to move to the T-1 closing NAV as the base. That is 160 days after today's date of October 23, 2026, so the current VWAP-based anchor will apply for roughly 5 more months.
What Moved Yesterday
Since the editor-curated briefing for this edition carries no closing prices, this section covers what has moved in the rules themselves, which is the shift most ETF investors are still adjusting to some 6 weeks after the September 7 start date. The 3 categories of ETF now follow 3 different band designs.
Equity and debt ETFs: a 10% band that can flex twice
For equity and debt ETFs, excluding overnight and liquid funds, the band now opens at 10% either side of the base price, half of the old 20%. When trades print at or above 9.90% away from the base, a 15-minute cooling-off period starts. If the trigger happens in the last 30 minutes of trading, the cooling-off period is 5 minutes. After cooling off, the band is flexed by 5% of the base price, only in the direction of the move, and at most 2 times in one direction. That gives a ceiling of 20%, the same as the old fixed band, but the market reaches it in stages.
The table below is an illustrative calculation, using a hypothetical base price of Rs 100. It is not a forecast for any fund.
| Stage | Band width (upside) | Upper limit on Rs 100 base | Cooling-off trigger |
|---|---|---|---|
| Opening band | 10% | Rs 110.00 | Trades at or above Rs 109.90 |
| After 1st flex | 15% | Rs 115.00 | Next flex after a further cooling-off |
| After 2nd flex (maximum) | 20% | Rs 120.00 | No further flex in this direction |
Because flexing happens only in the direction of the move, a rally that triggers a flex on the upside leaves the lower limit at Rs 90.00 in this example. One more detail matters for anyone who trades on both exchanges: SEBI's circular states that a flex on one exchange applies on the others, so the band you see on NSE and BSE should stay aligned.
Overnight and liquid ETFs: still 5%, but new close-out rules
Overnight and liquid ETFs keep a fixed 5% band. What has changed is the close-out procedure for short deliveries in these funds. The close-out price is the higher of 2 figures: the highest price recorded from the trade date to the auction date, or a price 5% above the latest closing price on the auction-offer day. On a hypothetical latest closing price of Rs 1,000, that second leg works out to Rs 1,050, so the close-out price can be no lower than Rs 1,050 in that example.
Gold and silver ETFs: a 6% band with no cap on flexes
Gold and silver ETFs have the most distinctive design. The band starts at 6% either side of the base price. Trades at 5.90% trigger a cooling-off period, after which the band flexes by 3%. If international prices move by more than the aggregate 9% daily price limit, the band may be relaxed further in 3% stages, with notice. Unlike equity ETFs, there is no upper or lower cap and no limit on the number of flexes.
| Stage (illustrative, Rs 100 base) | Band width | Upper limit | Lower limit |
|---|---|---|---|
| Opening band | 6% | Rs 106.00 | Rs 94.00 |
| After 1st flex (upside move) | 9% | Rs 109.00 | Rs 94.00 |
| Further relaxation, with notice | 12% and beyond, in 3% steps | Rs 112.00 and above | Rs 94.00 |
The reason for the design, as set out in the circular, is that the underlying metal trades globally around the clock. A domestic ETF that could only move 20% around a 2-day-old NAV was poorly matched to an asset that may already have repriced overnight in London or New York.
What to Watch Today
For anyone placing an ETF order at the open on October 23, 2026, 5 practical points follow from the June 15 circular.
- The pre-open call auction for commodity ETFs. Gold and silver ETFs now go through a pre-open call auction using the same mechanism described in para 17.1 of Chapter 1 of SEBI's Master Circular for stock exchanges. Orders placed before the open are matched at a single equilibrium price rather than at whatever the first trade happens to be. If you use the gold calculator to plan purchases, remember that your fill price is set by the auction, not by the previous day's NAV.
- The 9.90% and 5.90% triggers. For an equity ETF, a print at 9.90% from base starts a 15-minute pause in band expansion; for a gold or silver ETF, the trigger is 5.90%. A limit order placed just outside the opening band will not execute until the band flexes.
- The last 30 minutes. If an equity or debt ETF hits its trigger in the final 30 minutes of the session, the cooling-off period shortens from 15 minutes to 5 minutes, which means the band can widen faster late in the day.
- Liquidity in thinly traded ETFs. Where an ETF has too little trading to generate a 30-minute VWAP, the base falls back to the last traded price or the latest closing NAV. Before trading a small ETF, check the latest NAV published by the fund house or on the AMFI NAV page so that you know which anchor is likely to apply.
- Monthly investors. If you buy ETF units every month through your broker rather than a mutual fund SIP, the narrower 10% opening band reduces the chance of a single bad print far from fair value. A one-time investment can be modelled on the lumpsum calculator; the band rules do not change the long-term arithmetic, only the range of prices you can be filled at in a single session.
Key dates at a glance
| Date | Event | Reference |
|---|---|---|
| June 15, 2026 | SEBI issues ETF base price and price band circular | HO/47/11/11(1)2026-MRD-POD3/I/13804/2026 |
| August 28, 2026 | Effective date deferred | HO/47/11/11(1)2026-MRD-POD3/I/19839/2026 |
| September 1, 2026 | Original effective date (superseded) | June 15 circular |
| September 7, 2026 | New norms take effect | August 28 circular |
| April 1, 2027 | Base price moves to T-1 closing NAV | June 15 circular |
None of this changes what an ETF holds or how its NAV is computed; it changes only the range within which units can trade on the exchange in a single session. For the underlying concepts, see Oquilia's glossary entries on the ETF, NAV and liquidity. This note is educational and is not a recommendation to buy or sell any security.
FAQ
When did the new ETF price band rules take effect?
The rules took effect on September 7, 2026. SEBI's June 15, 2026 circular originally set September 1, 2026, and a second circular dated August 28, 2026 moved the date back by 6 days.
What is the new base price for an ETF?
From September 7, 2026, the base price is the T-1 closing price, calculated as the VWAP of the last 30 minutes of the previous session. If that is unavailable, exchanges use the day's last traded price and then the latest closing NAV. From April 1, 2027, the base moves to the T-1 closing NAV.
How wide is the price band for an equity ETF now?
It starts at 10% and can flex in steps of 5% of the base price, at most 2 times in one direction, to a maximum of 20%. Each flex follows a 15-minute cooling-off period triggered by trades at or above 9.90%, or 5 minutes in the last 30 minutes of trading.
Why do gold and silver ETFs have a call auction now?
Under SEBI's June 15, 2026 circular, commodity ETFs get a pre-open call auction using the mechanism in para 17.1 of Chapter 1 of the Master Circular, because the underlying metals trade globally around the clock and prices can move while Indian markets are shut.
Is there a limit on how far a gold ETF can move in a day?
The band starts at 6% and flexes by 3% after a cooling-off triggered at 5.90%. If international prices move beyond the aggregate 9% daily limit, the band may be relaxed further in 3% stages with notice, and there is no cap or limit on the number of flexes.
Did the rules for liquid and overnight ETFs change?
Their band stays fixed at 5%. The close-out price for short deliveries is now the higher of the highest price recorded from trade date to auction date, or 5% above the latest closing price on the auction-offer day.