The Securities and Exchange Board of India (SEBI) has introduced new rules for exchange-traded funds, or ETFs. The changes focus on one simple but important issue: how far an ETF price should be allowed to move on a trading day.
SEBI issued the main circular on June 15, 2026. It covers the base price, price bands, the pre-open call auction and the close-out process for ETFs. The regulator later extended the implementation timeline through its August 28, 2026 circular. The new framework took effect from September 7, 2026.
At first glance, this may look like a small technical change. It is not. Price bands are part of the basic structure of a market. They affect buyers, sellers, market makers and the way prices react when markets move fast.
The new ETF rules try to create a better balance between free price discovery and protection from extreme price moves.
Why ETF prices need special treatment
An ETF is a mutual fund scheme whose units trade on a stock exchange. The fund usually holds securities in the same proportion as its chosen index or asset class. Equity ETFs, debt ETFs, Gold ETFs and Silver ETFs are examples of this structure.
This creates an important difference between an ETF and a normal listed share.
A share represents one company. Its market price depends on what buyers and sellers think that company is worth. An ETF, however, holds a basket of assets. Its value comes from those underlying assets.
This means an ETF has two closely related values. One is its market price on the exchange. The other is its net asset value, or NAV, which reflects the value of the assets held by the fund.
Most of the time, these two values stay close. But they do not always move at exactly the same speed.
That gap matters a lot during a sharp market move.
The problem with the old system
SEBI’s earlier framework had a fixed plus or minus 20% price band for most ETFs. Overnight ETFs that invested only in TREPS had a 5% band.
The problem was that a fixed band could become less useful when market conditions changed very fast.
Imagine an ETF whose underlying assets rise sharply after a major global event. The ETF may need to adjust to a new fair value. But if the reference price used for the band is not close to the current market value, the permitted range may not reflect the real situation.
This can create pressure in the order book.
A buyer may want to pay more because the underlying assets have risen. A seller may also demand a higher price. If the price band stops the ETF from moving far enough, normal price discovery can become difficult.
The opposite can happen during a sharp fall.
This is where market microstructure becomes important.
What market microstructure means
Market microstructure is simply the study of how trading actually works.
It looks at the order book, buyers and sellers, bid and ask prices, liquidity, price discovery and the rules that decide how trades take place.
These details may sound small, but they can have a large effect on the final market price.
For an ETF, this matters even more because its value is tied to another group of assets. The ETF must allow its market price to respond to changes in those assets while still having safeguards against disorderly moves.
SEBI’s new rules are therefore not just about limiting volatility. They are also about improving the way ETF prices adjust to new information.
A more relevant base price
One of the key changes is the way the base price is set.
Under the new framework, the initial base price is linked to the previous day’s closing price. That closing price is based on the last 30-minute volume-weighted average price, or VWAP.
VWAP gives more weight to trades that involve larger volumes. This can provide a better picture of the price at which meaningful trading took place near the end of the session.
If there is no trade during the last 30 minutes, the last traded price is used. If there is no trade during the day, the latest NAV is used.
This approach tries to make the starting point for the next session more closely tied to actual market activity.
The new 10% price band
The biggest change for many ETFs is the introduction of an initial 10% price band.
For most equity and debt ETFs, the initial band is set at plus or minus 10%. This is narrower than the earlier 20% framework.
However, the rule does not permanently lock the ETF inside that 10% range.
If the ETF reaches the limit, a cooling-off period comes into play. After 15 minutes, the band can expand toward 20%.
This creates a two-stage system.
The first stage gives the market a tighter boundary. If the move is genuine and demand remains strong, the second stage gives the ETF more room to adjust.
This is an important distinction. SEBI is not simply making the band smaller. It is making the price response more gradual.
Why the 15-minute pause matters
The 15-minute cooling-off period is one of the most important parts of the framework.
A sudden move in an ETF does not always mean that its fair value has changed by the same amount. A large order, low liquidity or temporary imbalance between buyers and sellers can sometimes push a price sharply in one direction.
A pause gives the market time to absorb that move.
During this period, traders can reassess their orders. Market makers can review their quotes. Investors can look at the underlying assets and decide whether the ETF price still makes sense.
If the demand remains strong after the pause, the wider band gives the market more freedom.
This approach tries to avoid two extremes. One extreme is an overly strict price limit that blocks legitimate price discovery. The other is a completely open move that can become disorderly during a sudden shock.
The role of NAV will become more important
Another important part of the reform is the planned move toward the previous day’s closing NAV.
From April 1, 2027, exchanges and asset management companies are expected to work toward the use of the previous day’s closing NAV as the base reference.
This is significant because NAV represents the underlying value of the ETF portfolio.
The change shows that SEBI wants the price-band system to have a closer link with the actual value of the assets held by an ETF.
That can be especially useful for ETFs whose underlying markets are less liquid or whose trading hours differ from the Indian stock market.
What this means for investors
For ordinary investors, the change should make ETF price behaviour easier to understand.
An ETF will have a tighter initial range, but that range can expand if the market continues to move strongly. This means an investor should not assume that a 10% limit is a permanent maximum move for the day.
It is also important to remember that an ETF price and its NAV are not always identical.
Investors should therefore look beyond the last traded price. They should also consider the underlying index, the liquidity of the ETF, the bid-ask spread and the difference between the market price and the fund’s value.
The new rules do not remove market risk. They simply change how the exchange manages sharp price moves.
What it means for market makers
The changes may be even more important for market makers and other professional participants.
Market makers provide buy and sell quotes. Their job becomes harder when an ETF moves quickly or when its underlying assets have limited liquidity.
A better reference price can help them set quotes with more confidence. The staged price band can also give them more time to respond to sudden changes.
At the same time, a 15-minute cooling-off period can change the way they manage risk. They must decide whether a move reflects genuine information or a temporary imbalance.
This makes the quality of the ETF’s underlying market very important.
Regulation meets market reality
The deeper message behind the new framework is simple.
A market cannot be managed only through fixed limits. Rules must also consider how prices actually form.
ETFs are a clear example. Their exchange price depends on buyers and sellers, but their underlying value comes from a portfolio of assets. A good regulatory framework must respect both sides.
SEBI’s new approach tries to do that. It starts with a more market-based reference price, applies a 10% initial band, allows a move toward 20% after a 15-minute cooling-off period and places greater importance on NAV over time.
The result is a framework that gives the market room to adjust without giving sudden price moves unlimited freedom.
For investors, the main lesson is that ETF price bands are not just a technical exchange rule. They are part of the machinery that decides how prices respond to information.
And as ETFs become a larger part of the market, that machinery matters more than ever.
