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FEDERALBNK gamma exposure, walls and max pain for 21 Oct 2026

FEDERALBNK closed at ₹348.84 on 19 Oct 2026. Levels for the session of 21 Oct 2026 from that close: call wall ₹350, put wall ₹340, gamma flip ₹344 (the close sat above it), max pain ₹340 for the 27 Oct 2026 expiry. Put open interest exceeded call open interest: 3,82,37,500 call units and 4,22,52,500 put units. Calls added 33,87,500 units; puts added 1,42,20,000 units against the prior file. The FEDERALBNK gamma exposure by strike chart, the strike by expiry heatmap and the wall migration across archived sessions are at squawkflow.com/india/stocks/federalbnk, updated after each NSE end-of-day file.

Source: NSE end-of-day data, 19 Oct 2026. End of day, not live. Not investment advice.

Computed from the 19 Oct 2026 close. Next update after the 21 Oct 2026 close, checked hourly from 18:10 to 21:10 IST that day.

Close
348.84
19 Oct 2026, lot size 2500
Call wall
350
+0.33% from the close
Put wall
340
-2.53% from the close
Gamma flip
344
close above it
Max pain
340
Tue 27 Oct 2026 expiry
PCR (OI)
1.10
nearest expiry 1.13
Net GEX
₹12.9 cr
per 1% move
  1. Call wall350+0.33%
  2. Close348.84close
  3. Gamma flip344-1.39%
  4. Put wall340-2.53%
  5. Max pain340-2.53%

FEDERALBNK: what changed in the exchange file

FEDERALBNK's 27 Oct 2026 max pain was ₹340, below the close by 2.53%. This is an open-interest payout minimum, not a price target.

The largest absolute call OI change in FEDERALBNK's stored strike aggregation was at ₹360: +17,40,000 units, an addition.

The largest absolute put OI change in FEDERALBNK's stored strike aggregation was at ₹340: +30,15,000 units, an addition.

In FEDERALBNK's stored 16 Oct 2026 row, the close was ₹338, call OI 3,48,50,000 and put OI 2,80,32,500.

For FEDERALBNK's 27 Oct 2026 future, the closing price rose (3.34%) and open interest increased (3.46%) on 19 Oct 2026. Futures and option units are separate series.

Gamma exposure by strike

Put GEXStrikeCall GEXNetLevel
360₹9.2 cr
355₹5.6 cr
350₹8.4 crclosecall wall
345-₹1.2 crflip
340-₹1.8 crput wallmax pain
335-₹3.9 cr

Open interest and OI change by strike

Open interest and its change in units, summed over all listed expiries; GEX in ₹ crore per 1% move from expiries within 60 days. Strikes within 5% of the close.
StrikeCall OIPut OICall OI chgPut OI chgCall GEXPut GEXNet GEX
33522,55,00041,02,500-9,02,500+12,22,500₹4.7 cr-₹8.6 cr-₹3.9 cr
34046,47,50050,90,000-15,52,500+30,15,000₹13.2 cr-₹15 cr-₹1.8 cr
34529,10,00032,40,000-2,17,500+24,92,500₹10.8 cr-₹12 cr-₹1.2 cr
35061,22,50039,22,500+2,20,000+29,92,500₹21.8 cr-₹13.4 cr₹8.4 cr
35529,45,00012,32,500+14,45,000+6,37,500₹9.7 cr-₹4.1 cr₹5.6 cr
36047,70,0008,92,500+17,40,000+1,95,000₹11.4 cr-₹2.2 cr₹9.2 cr
36514,10,0001,70,000+5,47,500-15,000₹2.5 cr-₹0.3 cr₹2.2 cr

Strike by expiry heatmap

Net GEX (dealers long calls) by strike and expiry, ₹ crore per 1% move. Tint shows sign and size: one colour for positive gamma, the other for negative, and negative values carry a minus sign.
StrikeTue 27 Oct 2026Mon 23 Nov 2026
375₹0.58
370₹2₹0.66
365₹2.1₹0.13
360₹7.7₹1.4
355₹5.4₹0.19
350₹8.3
345-₹1.1-₹0.06
340-₹2.4₹0.54
335-₹3.7-₹0.18
330-₹2.9-₹0.51
325-₹1.6-₹0.33

Expiries

Lot sizes as printed on each contract row of the exchange file.
ExpiryDaysLot sizeCall OIPut OIPCRMax pain
Tue 27 Oct 2026825003,32,82,5003,76,77,5001.13340
Mon 23 Nov 202635250048,90,00045,65,0000.93340
Tue 29 Dec 202671250065,00010,0000.15330

Wall migration

  • Call wall330 to 350
  • Put wall320 to 340
  • Max pain330 to 340
  • Close320 to 348.84
DateCloseCall wallPut wallGamma flipMax painPCRCall OI chgPut OI chg
19 Oct 2026348.843503403443401.10+33,87,500+1,42,20,000
16 Oct 20263383403303293350.80+1,66,80,000+1,13,95,000
15 Oct 20263353303303243300.92+6,65,000+16,35,000
14 Oct 20263303303303183300.86+10,07,500-2,42,500
13 Oct 2026329.53303303223300.92-4,22,500-15,000
12 Oct 2026328.23303203203300.90+17,07,500+7,30,000
9 Oct 2026329.983303203223300.95+3,52,500+13,32,500
8 Oct 20263213303203143250.89-2,40,000-6,07,500
7 Oct 2026323.53303203183300.91+11,90,000+14,12,500
6 Oct 20263203303203133300.89+15,12,500-1,07,500
Method and sign convention

Sign convention on screen: Dealers long calls, short puts. Under the other reading (option writers short every option), net GEX is -₹161 cr per 1% move and there is no gamma flip. Why both are shown.

Settlement prices and open interest from 19 Oct 2026. 98 contracts used; 0 skipped with no solvable volatility. Calculation details and limits.