Delayed CBOE data, snapshot 2026-08-18. Spot $331.49.
Put/Call (OI)
0.52
20k P / 38k C
Put/Call (Volume)
2.18
2k P / 1k C today
30d ATM IV
27%
annualized implied move
Call wall
$340
8k contracts
Put wall
$310
2k contracts
Tail hedging
1.6×
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 | 0.98 | 2k |
| 2026-08-28 | 1k | 709 | 0.56 | 243 |
| 2026-09-04 | 875 | 941 | 1.08 | 127 |
| 2026-09-11 | 411 | 310 | 0.75 | 29 |
| 2026-09-18 | 22k | 3k | 0.16 | 686 |
| 2026-09-25 | 116 | 172 | 1.48 | 25 |
| 2026-10-02 | 12 | 4 | 0.33 | 51 |
| 2026-10-16 | 3k | 3k | 0.98 | 176 |
| 2026-12-18 | 1k | 1k | 1.09 | 20 |
| 2027-01-15 | 961 | 1k | 1.18 | 21 |
| 2027-03-19 | 612 | 684 | 1.12 | 6 |
| 2027-06-17 | 435 | 360 | 0.83 | 20 |
| 2028-01-21 | 872 | 1k | 1.18 | 14 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.