COALINDIA gamma exposure, walls and max pain for 9 Oct 2026
Source: NSE end-of-day data, 8 Oct 2026. End of day, not live. Not investment advice.
COALINDIA levels for the session of 9 Oct 2026, from the 8 Oct 2026 close of 409.35: call wall 430, put wall 420, gamma flip 387 (the close sat above it), max pain 420 for the 27 Oct 2026 expiry, put/call OI ratio 0.46, net GEX ₹24.9 cr per 1% move.
- Close
- 409.35
- 8 Oct 2026
- Call wall
- 430
- +5.04%
- Put wall
- 420
- +2.60%
- Gamma flip
- 387
- Max pain
- 420
- Tue 27 Oct 2026 expiry
- PCR (OI)
- 0.46
- nearest 0.47
- Net GEX
- ₹24.9 cr
- per 1% move
Sign convention on screen: Dealers long calls, short puts. Under the other reading (option writers short every option), net GEX is -₹88.7 cr per 1% move and there is no gamma flip. Why both are shown.
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 |
|---|---|---|---|---|---|---|---|
| 390 | 20,250 | 9,01,800 | -2,700 | +2,10,600 | ₹0.04 cr | -₹1.8 cr | -₹1.8 cr |
| 395 | 4,050 | 9,58,500 | 0 | +60,750 | ₹0.01 cr | -₹2.3 cr | -₹2.3 cr |
| 400 | 15,41,700 | 17,07,750 | +36,450 | +78,300 | ₹4.3 cr | -₹4.5 cr | -₹0.24 cr |
| 405 | 3,34,800 | 8,92,350 | +1,25,550 | +1,48,500 | ₹0.99 cr | -₹2.7 cr | -₹1.7 cr |
| 410 | 20,37,150 | 10,63,800 | +3,09,150 | -2,75,400 | ₹6.1 cr | -₹3.2 cr | ₹2.9 cr |
| 415 | 12,55,500 | 7,60,050 | +1,29,600 | -86,400 | ₹3.7 cr | -₹2.2 cr | ₹1.4 cr |
| 420 | 39,54,150 | 19,18,350 | -37,800 | -67,500 | ₹10.4 cr | -₹5 cr | ₹5.4 cr |
| 425 | 35,00,550 | 11,48,850 | -51,300 | -51,300 | ₹8.1 cr | -₹2.7 cr | ₹5.5 cr |
Strike by expiry heatmap
| Strike | Tue 27 Oct 2026 | Mon 23 Nov 2026 |
|---|---|---|
| 440 | ₹3.3 | ₹0.09 |
| 435 | ₹2 | |
| 430 | ₹6.6 | ₹0.19 |
| 425 | ₹5.5 | |
| 420 | ₹5.4 | -₹0.05 |
| 415 | ₹1.4 | |
| 410 | ₹2.9 | |
| 405 | -₹1.7 | |
| 400 | ₹0.18 | -₹0.42 |
| 395 | -₹2.3 | |
| 390 | -₹1.8 | |
| 385 | -₹0.33 | |
| 380 | -₹1.1 |
Expiries
| Expiry | Days | Lot size | Call OI | Put OI | PCR | Max pain |
|---|---|---|---|---|---|---|
| Tue 27 Oct 2026 | 19 | 1350 | 3,14,67,150 | 1,46,59,650 | 0.47 | 420 |
| Mon 23 Nov 2026 | 46 | 1350 | 9,27,450 | 3,33,450 | 0.36 | 420 |
| Tue 29 Dec 2026 | 82 | 1350 | 1,350 | 0 | 0.00 | no open interest yet |
Wall migration
| Date | Close | Call wall | Put wall | Gamma flip | Max pain | PCR | Call OI chg | Put OI chg |
|---|---|---|---|---|---|---|---|---|
| 8 Oct 2026 | 409.35 | 430 | 420 | 387 | 420 | 0.46 | +8,30,250 | +58,050 |
| 7 Oct 2026 | 414.49 | 430 | 420 | 389 | 420 | 0.47 | +7,23,600 | +2,43,000 |
| 6 Oct 2026 | 411.65 | 430 | 420 | 385 | 420 | 0.48 | +91,04,400 | +19,41,300 |
Method
Implied volatility from settlement prices, carry from put-call parity, risk-free rate 5.5%. 87 contracts used, 0 skipped with no solvable volatility, 0 expiring on the trade date left out. GEX is in ₹ crore per 1% move. Full method and sign convention.
Archive: 3 sessions stored since 6 Oct 2026, free, no account.