Delayed CBOE data, snapshot 2026-08-18. Spot $451.
Put/Call (OI)
0.91
43k P / 47k C
Put/Call (Volume)
1.31
5k P / 4k C today
30d ATM IV
89%
annualized implied move
Call wall
$600
3k contracts
Put wall
$400
2k contracts
Tail hedging
1.1×
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 | 9k | 11k | 1.14 | 2k |
| 2026-08-28 | 2k | 3k | 1.20 | 921 |
| 2026-09-04 | 1k | 2k | 1.53 | 650 |
| 2026-09-11 | 578 | 701 | 1.21 | 533 |
| 2026-09-18 | 2k | 2k | 0.84 | 2k |
| 2026-09-25 | 146 | 245 | 1.68 | 131 |
| 2026-10-02 | 26 | 21 | 0.81 | 134 |
| 2026-10-16 | 7k | 7k | 0.97 | 305 |
| 2026-12-18 | 4k | 4k | 1.14 | 967 |
| 2027-01-15 | 7k | 6k | 0.84 | 332 |
| 2027-03-19 | 2k | 2k | 0.69 | 348 |
| 2027-06-17 | 2k | 2k | 0.95 | 235 |
| 2028-01-21 | 4k | 2k | 0.54 | 345 |
| 2028-06-16 | 2k | 957 | 0.62 | 73 |
| 2028-12-15 | 3k | 889 | 0.28 | 146 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.