In a major sweeping move to clean up systemic inefficiencies in the passive investment space, the Securities and Exchange Board of India (SEBI) has released a comprehensive regulatory circular to overhaul the trading and pricing framework of Exchange Traded Funds (ETFs). The new rules are designed to aggressively narrow the distortion gap between an ETF’s secondary market trading price and its real-time underlying Net Asset Value (NAV). The market regulator confirmed that the revised guidelines will officially take effect on September 1, 2026.
The structural reset follows extensive analysis by SEBI’s Secondary Market Advisory Committee. For years, retail investors faced intense pricing anomalies because stock exchanges were forced to use an obsolete reference baseline to determine daily trading bounds. This created massive tracking errors, unaligned arbitrage loops, and artificial liquidity blocks during high-volatility sessions.
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Eliminating the Outdated T-2 Day Lag
Under the legacy system, stock exchanges utilized an ETF’s historical NAV from two trading days prior (T-2) as the base price for executing trading filters. This built-in delay meant that sudden, large-scale global macro changes or domestic corporate movements were completely ignored by the exchange’s automation scripts on the live trading day.
To fix this delay, SEBI is permanently shifting the base price calculation model to a more current benchmark. The base price will now be derived using the previous day’s (T-1) market data based on a strict priority ladder:
- Primary Reference: The Volume Weighted Average Price (VWAP) recorded during the final 30 minutes of the previous trading session.
- Secondary Fallback: The definitive Last Traded Price (LTP) of the previous session if no trades occurred during the closing half-hour.
- Final Fallback: The latest available formal closing NAV if the ETF recorded zero trading volume throughout the entire previous day.
Furthermore, SEBI has directed asset management companies (AMCs) and stock clearing houses to eliminate manual adjustment errors linked to dividends and stock bonuses by working out a transition to a real-time T-1 closing NAV baseline by April 1, 2027.
Transition to Dynamic Price Band Flexing
Instead of applying a flat, rigid 20% fixed price ceiling that often allowed speculative elements to execute flash crashes or create artificial spikes, SEBI is deploying a responsive, dynamic circuit-breaker system tailored to separate asset classes.
For Equity and Debt ETFs (excluding overnight and liquid products), the system will launch with a tighter initial price band of ±10%. If intense trading activity pushes the market price to or above 9.9% of this threshold, it triggers an automated 15-minute cooling-off period.
Once this window closes, the exchange will flex the price band outward by an incremental 5% in the direction of the price momentum. This flexing loop can occur twice per trading session, allowing the trading band to widen to a maximum cap of ±20%. To protect closing market transactions, if a trigger hits during the final 30 minutes of the day, the cooling-off window drops to a rapid 5-minute pause.
Pre-Open Call Auctions for Gold and Silver
Commodity-based ETFs face a separate problem because the underlying global gold and silver spots are traded continuously across international markets, while domestic ETF units are locked inside standard Indian market hours. This mismatch frequently triggers chaotic, volatile openings on domestic exchanges.
To establish an equilibrium opening price, SEBI has introduced an exclusive pre-open call auction mechanism dedicated solely to Gold and Silver ETFs. Additionally, these commodity pools will start the trading day with a narrower initial dynamic band of ±6%, which can be flexed outward in dynamic stages of 3% with no upper restriction. If global commodity lines experience extreme overnight moves after Indian markets close, stock exchanges are authorized to dynamically expand domestic limits to align with international metrics.
Liquid and overnight ETFs, which back stable asset vectors like Triparty Repos (TREPs), will remain completely insulated from this flexing logic and will continue to operate under a standard, tightly controlled fixed price filter of ±5%.
