HDFCBANK 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.
HDFCBANK levels for the session of 9 Oct 2026, from the 8 Oct 2026 close of 692.31: call wall 720, put wall 700, gamma flip 657 (the close sat above it), max pain 720 for the 27 Oct 2026 expiry, put/call OI ratio 0.47, net GEX ₹191 cr per 1% move.
- Close
- 692.31
- 8 Oct 2026
- Call wall
- 720
- +4.00%
- Put wall
- 700
- +1.11%
- Gamma flip
- 657
- Max pain
- 720
- Tue 27 Oct 2026 expiry
- PCR (OI)
- 0.47
- nearest 0.47
- Net GEX
- ₹191 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 -₹727 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 |
|---|---|---|---|---|---|---|---|
| 660 | 3,55,550 | 48,84,100 | +1,18,300 | +23,32,200 | ₹1 cr | -₹15.2 cr | -₹14.1 cr |
| 670 | 4,15,350 | 55,24,350 | +1,11,150 | +6,50,000 | ₹1.6 cr | -₹21.4 cr | -₹19.8 cr |
| 680 | 15,13,850 | 51,01,850 | +3,96,500 | +1,20,900 | ₹6.6 cr | -₹22.1 cr | -₹15.5 cr |
| 690 | 25,31,750 | 40,70,300 | +13,26,000 | +3,16,550 | ₹12.2 cr | -₹20.1 cr | -₹7.8 cr |
| 700 | 1,45,11,250 | 1,17,55,250 | +53,51,450 | +6,61,050 | ₹69.8 cr | -₹57.1 cr | ₹12.7 cr |
| 710 | 1,39,93,200 | 43,59,550 | +33,42,300 | -7,89,100 | ₹65.3 cr | -₹20 cr | ₹45.3 cr |
| 720 | 2,15,95,600 | 1,11,80,650 | +9,99,700 | -2,97,700 | ₹86.4 cr | -₹44.5 cr | ₹41.9 cr |
Strike by expiry heatmap
| Strike | Tue 27 Oct 2026 | Mon 23 Nov 2026 |
|---|---|---|
| 740 | ₹32.6 | ₹1 |
| 730 | ₹39.3 | ₹0.77 |
| 720 | ₹39.8 | ₹2.1 |
| 710 | ₹45.3 | ₹0.05 |
| 700 | ₹10.6 | ₹2.1 |
| 690 | -₹8.1 | ₹0.23 |
| 680 | -₹14.3 | -₹1.2 |
| 670 | -₹19.5 | -₹0.33 |
| 660 | -₹13.8 | -₹0.28 |
| 650 | -₹5.2 | -₹0.35 |
| 640 | -₹2.4 | -₹0.29 |
Expiries
| Expiry | Days | Lot size | Call OI | Put OI | PCR | Max pain |
|---|---|---|---|---|---|---|
| Tue 27 Oct 2026 | 19 | 650 | 15,98,86,350 | 7,58,64,100 | 0.47 | 720 |
| Mon 23 Nov 2026 | 46 | 650 | 1,06,85,350 | 49,11,400 | 0.46 | 710 |
| Tue 29 Dec 2026 | 82 | 650 | 6,95,500 | 3,23,050 | 0.46 | 700 |
Wall migration
| Date | Close | Call wall | Put wall | Gamma flip | Max pain | PCR | Call OI chg | Put OI chg |
|---|---|---|---|---|---|---|---|---|
| 8 Oct 2026 | 692.31 | 720 | 700 | 657 | 720 | 0.47 | +1,36,48,700 | +35,45,750 |
| 7 Oct 2026 | 702.76 | 720 | 720 | 662 | 720 | 0.49 | +1,40,39,350 | +26,52,650 |
| 6 Oct 2026 | 711.44 | 720 | 720 | 670 | 720 | 0.52 | +11,700 | -1,00,750 |
Method
Implied volatility from settlement prices, carry from put-call parity, risk-free rate 5.5%. 93 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.