Delayed CBOE data, snapshot 2026-08-18. Spot $370.
Put/Call (OI)
0.88
88k P / 100k C
Put/Call (Volume)
0.95
19k P / 20k C today
30d ATM IV
28%
annualized implied move
Call wall
$410
12k contracts
Put wall
$320
6k contracts
Tail hedging
2.4×
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 | 14k | 18k | 1.23 | 4k |
| 2026-08-28 | 2k | 2k | 1.13 | 821 |
| 2026-09-04 | 527 | 1k | 2.36 | 206 |
| 2026-09-11 | 287 | 759 | 2.64 | 223 |
| 2026-09-18 | 36k | 22k | 0.60 | 2k |
| 2026-09-25 | 116 | 203 | 1.75 | 252 |
| 2026-10-02 | 11 | 41 | 3.73 | 244 |
| 2026-10-16 | 4k | 4k | 0.91 | 434 |
| 2026-11-20 | 5k | 6k | 1.35 | 287 |
| 2026-12-18 | 6k | 7k | 1.29 | 30k |
| 2027-01-15 | 19k | 17k | 0.90 | 418 |
| 2027-03-19 | 3k | 5k | 1.55 | 58 |
| 2027-06-17 | 2k | 2k | 0.89 | 143 |
| 2028-01-21 | 9k | 4k | 0.48 | 93 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.