Daily digest / Bank Nifty / 2026-09-21 · this week
Bank Nifty · Monday 21 Sep 2026 · close
56,622
+101.2 (+0.18%)
2nd straight up dayExpiry Tue 29 Sep · 6 sessions
Quiet, range-bound session
Bank Nifty traded a narrow 263 pts range and closed at 56,622. Put writers added the most fresh OI at 56,500 (+1.1 L), right where the low held. Call writers built positions at 56,600–57,000, led by 56,600 (+1.4 L). Max pain moved from 57,200 to 57,000.
Spot
Max pain
56,500 support
PCR
15-min · IST
Key levels into expiry
58,000
Call wall · 16.5 L OI
resistance
57,000
Fresh calls +0.6 L · Max pain
cap
56,700
Fresh calls +0.5 L
cap
56,622
Close
●
56,500
Fresh puts +1.1 L · held the low
support
56,000
Put wall · 10.0 L OI
floor
55,000
Fresh puts +1.0 L
support
Where writers added today
■ calls ■ puts · OI change from the first snapshot to the close, strikes near spot
Move vs what options priced
Monthly ATM straddle at open903
Session range263
The session used 29% of the monthly straddle's priced move.
Last 6 sessions
Reading these numbers
- Max pain is the strike where option buyers collectively lose the most at expiry. It often drifts with price, and the pull tends to strengthen into expiry.
- Fresh OI shows where option writers opened new positions during the session. Heavy put writing below price often marks a level sellers expect to hold; heavy call writing above marks a ceiling.
- PCR is put OI ÷ call OI for the monthly expiry.
- Straddle vs range compares the ATM straddle price at the open (what options priced in) with the distance price actually covered.
Descriptive summaries of recorded option-chain positioning, generated automatically — not trading signals or advice.
Read the disclaimer →
Related reading
PCR explained →
How put-call ratio is calculated and when it misleads.
Max pain theory →
Why max pain matters near expiry.
OI buildup →
Reading the four OI patterns.