SEBI Changes ETF Trading Rules: New Price Bands, Base Price Method and Gold-Silver Pre-Open Auction Explained

SEBI ETF Rules 2026: Investors who trade or invest in exchange-traded funds (ETFs) need to take note of an important change in market rules. A revised framework for ETF trading has come into effect from September 7, 2026, bringing significant changes to the way base prices and price bands are determined.

The changes are particularly relevant for investors dealing in equity, debt, gold, silver, liquid and overnight ETFs. Gold and silver ETFs will also have a pre-open auction mechanism, aimed at improving price discovery before regular trading begins.

The overall objective of the changes is to allow ETF prices to respond more effectively to market movements while reducing situations where existing price limits prevent an ETF from moving closer to its underlying value.

Here is what ETF investors need to know about the three major changes.

Why Was the Existing ETF Trading System Changed?

Under the earlier system, exchanges used the ETF's NAV from two days earlier, known as the T-2 NAV, while determining its base price.

There was another limitation: ETFs across different asset categories generally operated with the same 20% price band.

This arrangement could create problems during periods of sharp market movement because an ETF's underlying assets could change significantly in value while its trading limits were still based on older information.

Consider a simple example.

Suppose an ETF had an NAV of ₹100 on Monday. A major rally in the relevant global market on Tuesday pushes its underlying value to ₹125.

If Wednesday's trading reference were still linked to Monday's ₹100 value, a 20% price limit could restrict the ETF to ₹120. Despite its underlying value reaching ₹125, the ETF might not immediately be able to reflect that movement.

The revised framework seeks to address such situations.

Change 1: Base Price Will Use More Recent Trading Data

One of the most important changes concerns the ETF base price.

Instead of relying on the NAV from two days earlier, the base price will now be determined using the volume-weighted average price (VWAP) from the final 30 minutes of trading on the previous trading day.

In simple terms, today's trading range will be based more closely on actual trading activity from yesterday evening rather than an NAV figure that may already be two days old.

This should make the reference price more responsive to recent market conditions.

There is another change scheduled for the future. According to the supplied information, from April 1, 2027, the previous day's closing NAV will become the basis for determining the base price.

Change 2: Different ETFs Will Have Different Price Bands

Another major change is the end of a uniform approach to price limits across ETF categories.

Under the revised system, the applicable trading band will depend on the type of assets held by the ETF.

Equity and Debt ETFs

Equity and debt ETFs will begin the trading session with a 10% price band.

If there is unusually high market volatility, the band may be expanded in stages up to 20%, subject to a 15-minute cooling-off period.

The mechanism is designed to give the market time to adjust while still allowing prices to respond to major movements.

Gold and Silver ETFs

Gold and silver ETFs will follow a different system because precious metals trade internationally across different time zones, meaning significant price movements can occur while Indian exchanges are closed.

These ETFs will initially have a 6% price band.

If international gold or silver prices have moved sharply, the trading limit can be expanded in additional 3% stages. According to the supplied report, this expansion mechanism does not have a fixed upper cap.

This could help domestic gold and silver ETFs adjust more effectively to major overnight changes in international bullion prices.

Liquid and Overnight ETFs

Liquid and overnight ETFs generally experience much lower volatility compared with equity or commodity ETFs.

For these categories, the price band will remain fixed at 5%.

The differentiated approach means trading limits will now better reflect the characteristics and volatility of different ETF asset classes.

Change 3: Pre-Open Auction for Gold and Silver ETFs

Gold and silver ETFs will now also get a pre-open call auction before normal market trading begins.

The mechanism is similar in concept to the pre-open price discovery process used in the equity market.

Instead of allowing the first individual trade of the session to have a disproportionate influence on the opening price, buy and sell orders can be considered collectively before regular trading starts.

This process is intended to establish a more representative opening price based on overall demand and supply.

The feature could be particularly useful after major overnight movements in international gold or silver markets.

When Did the New ETF Rules Take Effect?

The revised framework was initially expected to become effective from September 1, 2026.

However, according to the supplied report, exchanges were provided additional time to make the necessary system changes. As a result, the rules became effective from September 7, 2026.

Investors who regularly trade ETFs should therefore understand how these mechanisms can affect order execution, price discovery and temporary trading pauses.

What Should ETF Investors Do Now?

The new rules may improve the price-discovery mechanism, but investors still need to exercise caution when buying or selling ETFs.

One useful step is to check an ETF's indicative NAV, or iNAV, before placing an order. The live indicative NAV available through the relevant asset management company's platform can help investors compare the ETF's traded price with its indicative underlying value.

Investors may also consider using limit orders instead of market orders, particularly around the market opening and when trading gold or silver ETFs.

With a limit order, investors specify the maximum price they are prepared to pay when buying or the minimum price they are willing to accept when selling. This can provide greater control when market prices are moving rapidly.

Don't Misinterpret a Temporary Trading Pause

Investors may occasionally notice trading being paused when an ETF experiences an unusually large price movement.

Such a pause does not necessarily indicate a problem with the fund itself.

For categories where the price band can expand, the framework includes a cooling-off mechanism. The temporary pause gives the market time before the permissible trading range is widened further.

Investors should therefore check the reason for the pause rather than reacting immediately.

What Do the New ETF Rules Mean for Retail Investors?

The revised framework is designed to make ETF trading more responsive to current market conditions.

Using more recent price information for the base price could reduce distortions caused by outdated reference values. Separate price-band structures for different asset classes can also provide more flexibility where volatility characteristics differ significantly.

The changes to gold and silver ETFs are particularly noteworthy because international bullion prices can move substantially outside Indian market hours.

At the same time, the new framework does not eliminate investment or trading risk. An ETF's market price can still differ from its underlying value, particularly during volatile periods or when liquidity is limited.

Investors should therefore continue monitoring iNAV, liquidity, bid-ask spreads and order prices before executing trades.

Disclaimer: This article is for informational purposes only and should not be treated as investment advice. ETFs and other market-linked investments are subject to market risks. Investors should assess their financial situation and, where necessary, consult a qualified professional before making investment decisions.