Delayed CBOE data, snapshot 2026-08-18. Spot $134.2.
Put/Call (OI)
0.73
8k P / 11k C
Put/Call (Volume)
1.85
264 P / 143 C today
30d ATM IV
21%
annualized implied move
Call wall
$140
3k contracts
Put wall
$125
1k contracts
Tail hedging
2.3×
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 | 3k | 2k | 0.81 | 71 |
| 2026-09-18 | 7k | 4k | 0.60 | 188 |
| 2026-12-18 | 979 | 1k | 1.25 | 70 |
| 2027-03-19 | 223 | 279 | 1.25 | 78 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.