Delayed CBOE data, snapshot 2026-08-19. Spot $227.31.
Put/Call (OI)
0.69
21k P / 30k C
Put/Call (Volume)
1.09
1k P / 978 C today
30d ATM IV
26%
annualized implied move
Call wall
$240
8k contracts
Put wall
$220
4k contracts
Tail hedging
0.3×
deep-OTM puts vs calls
All expiries combined. Amber lines mark the call and put walls; the dashed line is spot.
At-the-money implied volatility per expiry.
IV by strike — expiry 2026-09-18. A steep left side = expensive downside protection.
Daily ATM IV (~30 DTE bucket) collected since March 2026. Rising IV into an event = the market bracing; collapsing IV after = the crush.
| Expiry | Call OI | Put OI | P/C | Volume today |
|---|---|---|---|---|
| 2026-08-21 | 7k | 7k | 1.02 | 691 |
| 2026-08-28 | 722 | 706 | 0.98 | 197 |
| 2026-09-04 | 112 | 129 | 1.15 | 29 |
| 2026-09-11 | 135 | 313 | 2.32 | 67 |
| 2026-09-18 | 6k | 4k | 0.65 | 467 |
| 2026-09-25 | 343 | 282 | 0.82 | 27 |
| 2026-10-02 | 83 | 18 | 0.22 | 10 |
| 2026-10-16 | 8k | 2k | 0.21 | 225 |
| 2026-11-20 | 304 | 61 | 0.20 | 43 |
| 2026-12-18 | 928 | 747 | 0.80 | 104 |
| 2027-01-15 | 1k | 1k | 1.01 | 31 |
| 2027-03-19 | 995 | 2k | 1.73 | 7 |
| 2027-06-17 | 2k | 2k | 1.25 | 107 |
| 2028-01-21 | 2k | 1k | 0.43 | 36 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.