TATAPOWER gamma exposure, walls and max pain for 28 Oct 2026
TATAPOWER closed at ₹339.07 on 27 Oct 2026. Levels for the session of 28 Oct 2026 from that close: call and put walls both at ₹350, gamma flip ₹344 (the close sat below it), max pain ₹360 for the 23 Nov 2026 expiry. Put open interest exceeded call open interest: 1,29,99,250 call units and 1,57,86,150 put units. Calls added 25,98,400 units; puts added 33,95,900 units against the prior file. The TATAPOWER gamma exposure by strike chart, the strike by expiry heatmap and the wall migration across archived sessions are at squawkflow.com/india/stocks/tatapower, updated after each end-of-day exchange file.
Source: public end-of-day exchange data, 27 Oct 2026. End of day, not live. Not investment advice.
Computed from the 27 Oct 2026 close. Next update after the 28 Oct 2026 close, checked hourly from 18:10 to 21:10 IST that day.
- Close
- 339.07
- 27 Oct 2026, lot size 1450
- Call wall
- 350
- +3.22% from the close
- Put wall
- 350
- +3.22% from the close
- Gamma flip
- 344
- close below it
- Max pain
- 360
- Mon 23 Nov 2026 expiry
- PCR (OI)
- 1.21
- nearest expiry 1.22
- Net GEX
- -₹0.89 cr
- per 1% move
- Max pain360+6.17%
- Call wall350+3.22%
- Put wall350+3.22%
- Gamma flip344+1.45%
- Close339.07close
TATAPOWER: what changed in the exchange file
TATAPOWER's 23 Nov 2026 max pain was ₹360, above the close by 6.17%. This is an open-interest payout minimum, not a price target.
The largest absolute call OI change in TATAPOWER's stored strike aggregation was at ₹340: +7,30,800 units, an addition.
The largest absolute put OI change in TATAPOWER's stored strike aggregation was at ₹350: +7,97,500 units, an addition.
In TATAPOWER's stored 26 Oct 2026 row, the close was ₹338.51, call OI 2,63,13,150 and put OI 2,27,27,300.
For TATAPOWER's 23 Nov 2026 future, the closing price rose (0.48%) and open interest increased (14.65%) on 27 Oct 2026. Futures and option units are separate series.
Gamma exposure by strike
Open interest and OI change by strike
| Strike | Call OI | Put OI | Call OI chg | Put OI chg | Call GEX | Put GEX | Net GEX |
|---|---|---|---|---|---|---|---|
| 325 | 53,650 | 4,55,300 | +46,400 | +2,92,900 | ₹0.07 cr | -₹0.63 cr | -₹0.56 cr |
| 330 | 3,20,450 | 8,42,450 | +1,34,850 | +49,300 | ₹0.5 cr | -₹1.3 cr | -₹0.82 cr |
| 335 | 3,05,950 | 3,20,450 | +1,05,850 | +79,750 | ₹0.54 cr | -₹0.57 cr | -₹0.03 cr |
| 340 | 13,97,800 | 16,57,350 | +7,30,800 | +6,09,000 | ₹2.6 cr | -₹3.1 cr | -₹0.47 cr |
| 345 | 13,73,150 | 7,75,750 | +4,98,800 | +2,52,300 | ₹2.6 cr | -₹1.5 cr | ₹1.1 cr |
| 350 | 20,66,250 | 22,86,650 | +1,11,650 | +7,97,500 | ₹3.8 cr | -₹4.2 cr | -₹0.41 cr |
| 355 | 3,40,750 | 2,21,850 | +89,900 | +7,250 | ₹0.57 cr | -₹0.37 cr | ₹0.2 cr |
Strike by expiry heatmap
| Strike | Mon 23 Nov 2026 |
|---|---|
| 365 | ₹0.32 |
| 360 | ₹0.74 |
| 355 | ₹0.2 |
| 350 | -₹0.41 |
| 345 | ₹1.1 |
| 340 | -₹0.47 |
| 335 | |
| 330 | -₹0.82 |
| 325 | -₹0.56 |
| 320 | -₹0.75 |
| 315 | -₹0.21 |
Expiries
| Expiry | Days | Lot size | Call OI | Put OI | PCR | Max pain |
|---|---|---|---|---|---|---|
| Mon 23 Nov 2026 | 27 | 1450 | 1,29,64,450 | 1,57,61,500 | 1.22 | 360 |
| Tue 29 Dec 2026 | 63 | 1450 | 34,800 | 24,650 | 0.71 | 350 |
Wall migration
- Call wall360 to 350
- Put wall360 to 350
- Max pain365 to 360
- Close351.65 to 339.07
| Date | Close | Call wall | Put wall | Gamma flip | Max pain | PCR | Call OI chg | Put OI chg |
|---|---|---|---|---|---|---|---|---|
| 27 Oct 2026 | 339.07 | 350 | 350 | 344 | 360 | 1.21 | +25,98,400 | +33,95,900 |
| 26 Oct 2026 | 338.51 | 340 | 340 | 333 | 355 | 0.86 | +15,57,300 | +10,09,200 |
| 23 Oct 2026 | 348.03 | 345 | 350 | 342 | 360 | 0.88 | +1,50,800 | -12,68,750 |
| 22 Oct 2026 | 353.5 | 360 | 350 | 348 | 360 | 0.93 | -2,00,100 | +12,93,400 |
| 21 Oct 2026 | 351.99 | 350 | 350 | 346 | 360 | 0.88 | +4,26,300 | -12,39,750 |
| 19 Oct 2026 | 352.25 | 360 | 350 | 350 | 360 | 0.94 | +9,03,350 | +6,85,850 |
| 16 Oct 2026 | 353.84 | 360 | 350 | 350 | 360 | 0.95 | -10,01,950 | +3,97,300 |
| 15 Oct 2026 | 349.78 | 360 | 350 | 344 | 360 | 0.89 | +1,59,500 | -1,98,650 |
| 14 Oct 2026 | 353 | 360 | 350 | 344 | 360 | 0.91 | -7,17,750 | +10,90,400 |
| 13 Oct 2026 | 345 | 350 | 345 | 334 | 360 | 0.84 | -11,600 | +89,900 |
| 12 Oct 2026 | 343.69 | 350 | 345 | 333 | 360 | 0.83 | -2,23,300 | +1,46,450 |
| 9 Oct 2026 | 342.15 | 350 | 345 | 330 | 360 | 0.82 | +9,46,850 | -1,33,400 |
| 8 Oct 2026 | 335.65 | 360 | 335 | 333 | 360 | 0.86 | +32,97,300 | +14,76,100 |
| 7 Oct 2026 | 345.15 | 360 | 345 | 343 | 360 | 0.92 | +44,00,750 | +36,11,950 |
| 6 Oct 2026 | 351.65 | 360 | 360 | 343 | 365 | 0.95 | +9,93,250 | +6,64,100 |
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 -₹33.2 cr per 1% move and there is no gamma flip. Why both are shown.
Settlement prices and open interest from 27 Oct 2026. 47 contracts used; 1 skipped with no solvable volatility. Calculation details and limits.