Delayed CBOE data, snapshot 2026-08-18. Spot $171.5.
Put/Call (OI)
0.82
67k P / 83k C
Put/Call (Volume)
0.65
2k P / 3k C today
30d ATM IV
41%
annualized implied move
Call wall
$180
7k contracts
Put wall
$120
12k contracts
Tail hedging
2.6×
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 | 31k | 24k | 0.79 | 1k |
| 2026-09-18 | 16k | 17k | 1.05 | 2k |
| 2026-10-16 | 5k | 6k | 1.18 | 589 |
| 2026-11-20 | 6k | 5k | 0.83 | 188 |
| 2026-12-18 | 3k | 2k | 0.57 | 30 |
| 2027-01-15 | 12k | 8k | 0.70 | 335 |
| 2027-03-19 | 3k | 2k | 0.72 | 61 |
| 2027-06-17 | 1k | 1k | 1.01 | 307 |
| 2028-01-21 | 5k | 2k | 0.35 | 289 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.