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BankingPre-market

New SEBI rules impact Nifty Bank index constituents

pre-market1 source ↓written by the desknot a recommendation

top constituents
20%
and a combined
33%
for the top
45%

The Securities and Exchange Board of India (SEBI) has introduced new eligibility criteria affecting the Nifty Bank index. Key changes include a cap on the weight of top constituents at 20% (down from 33%) and a combined weight limit of 45% for the top three constituents, impacting HDFC Bank, ICICI Bank, and State Bank of India.

These adjustments may lead to increased volatility in Nifty Bank stocks as the weightage of major players is gradually reduced, potentially influencing trading strategies in the sector.

Not investment advice. For informational purposes only.

OI Charts is not a SEBI-registered investment adviser or research analyst. This bulletin was written by the OI Charts desk from the public sources listed here. It is commentary on market conditions, not a basis for any investment decision and not a recommendation to buy or sell any security. Prices as of 1 Nov 2025, 07:06 IST.

Sourcesnews.google.com

The market after the news

HDFCBANK closed +0.5% on the day of the news, from ₹987.30 to ₹992.65; Nifty +0.2% over the same session; futures OI −0.8%.

Bulletin at 07:06 IST on 1 Nov 2025. Every change is measured from ₹987.30, the last close before it, on 31 Oct. Nifty 50 is measured over the same sessions.

  • HDFCBANK close ₹
  • Nifty 50, rebased to the close before the news
  • close before the news
  • above it
  • below it
  • futures OI, lots
HDFCBANK closes around the bulletin against the close before the news, with Nifty 50 rebased to it901.21987.301073axis spans 19%before the news · 31 Oct987.30Nifty 50HDFCBANKbulletinD0+1+3+527 Oct7 Nov18 NovFutures open interest, lotspeak 4.0 LReference close ₹987.30. 16 sessions from 27 Oct to 18 Nov; the price axis spans 19 percent.
price axis fixed at 4 × the 14-session true range around the close before the news · values printed at each marked session
Closes after the news against the close before it, with Nifty 50 over the same span
SessionClose ₹Change %Nifty %
Before31 Oct₹987.30basebase
On the day3 Nov₹992.65▲ +0.5%▲ +0.2%+0.4 pp difference
+1 session4 Nov₹985.25▼ −0.2%▼ −0.5%+0.3 pp difference
+3 sessions7 Nov₹982.30▼ −0.5%▼ −0.9%+0.4 pp difference
+5 sessions11 Nov₹991.70▲ +0.5%▼ −0.1%+0.6 pp difference
Gap at the open, % · ₹
▼ −0.2%−2.27 on 3 Nov
Day's range, % · ₹
1.1%≈ 11 high to low
Volume on the day
0.78×the 20-session average
Futures OI on the day
▼ −0.8%−3,200 lots · short covering · price +0.5%
Futures OI open, lots
3.8 L3 Nov · 25 Nov expiry
Futures premium, ₹
+3.80+0.4% to spot
Puts per call, by OI
0.78from 0.78 the session before
Max pain
1,000from 1,000 the session before

Source NSE UDiFF bhavcopy · HDFCBANK on the desk →

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