Delayed CBOE data, snapshot 2026-08-18. Spot $370.4.
Put/Call (OI)
0.66
2k P / 4k C
Put/Call (Volume)
1.10
11 P / 10 C today
30d ATM IV
33%
annualized implied move
Call wall
$410
730 contracts
Put wall
$350
558 contracts
Tail hedging
0.2×
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 | 1k | 1k | 1.06 | 17 |
| 2026-09-18 | 858 | 338 | 0.39 | 1 |
| 2026-10-16 | 567 | 435 | 0.77 | 2 |
| 2026-12-18 | 400 | 231 | 0.58 | 1 |
| 2027-01-15 | 532 | 76 | 0.14 | 0 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.