Delayed CBOE data, snapshot 2026-08-17. Spot $225.12.
Put/Call (OI)
0.83
6.5M P / 7.9M C
Put/Call (Volume)
0.55
1.0M P / 1.8M C today
30d ATM IV
38%
annualized implied move
Call wall
$250
461k contracts
Put wall
$180
382k contracts
Tail hedging
1.9×
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 |
|---|---|---|---|---|
| 2026-08-19 | 59k | 49k | 0.83 | 367k |
| 2026-08-21 | 1.0M | 768k | 0.74 | 450k |
| 2026-08-24 | 49k | 18k | 0.37 | 77k |
| 2026-08-28 | 242k | 117k | 0.48 | 206k |
| 2026-08-31 | 0 | 0 | — | 16k |
| 2026-09-04 | 138k | 143k | 1.04 | 38k |
| 2026-09-11 | 41k | 21k | 0.51 | 13k |
| 2026-09-18 | 957k | 820k | 0.86 | 128k |
| 2026-09-25 | 47k | 22k | 0.47 | 7k |
| 2026-10-02 | 2k | 2k | 1.23 | 10k |
| 2026-10-16 | 515k | 414k | 0.80 | 43k |
| 2026-11-20 | 253k | 252k | 0.99 | 32k |
| 2026-12-18 | 1.1M | 1.0M | 0.94 | 24k |
| 2027-01-15 | 1.2M | 911k | 0.76 | 29k |
| 2027-02-19 | 38k | 49k | 1.30 | 9k |
| 2027-03-19 | 289k | 284k | 0.98 | 13k |
| 2027-06-17 | 431k | 452k | 1.05 | 14k |
| 2027-09-17 | 87k | 90k | 1.03 | 6k |
| 2027-12-17 | 386k | 376k | 0.98 | 5k |
| 2028-01-21 | 533k | 292k | 0.55 | 6k |
| 2028-06-16 | 72k | 80k | 1.12 | 2k |
| 2028-12-15 | 306k | 214k | 0.70 | 5k |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.