Delayed CBOE data, snapshot 2026-08-18. Spot $144.35.
Put/Call (OI)
0.52
78k P / 150k C
Put/Call (Volume)
0.68
2k P / 3k C today
30d ATM IV
52%
annualized implied move
Call wall
$400
11k contracts
Put wall
$140
5k 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 | 23k | 14k | 0.63 | 2k |
| 2026-08-28 | 2k | 2k | 0.79 | 300 |
| 2026-09-04 | 1k | 2k | 1.59 | 65 |
| 2026-09-11 | 399 | 2k | 4.13 | 17 |
| 2026-09-18 | 16k | 10k | 0.61 | 1k |
| 2026-09-25 | 816 | 526 | 0.64 | 37 |
| 2026-10-02 | 12 | 15 | 1.25 | 8 |
| 2026-10-16 | 6k | 11k | 1.71 | 515 |
| 2026-11-20 | 4k | 5k | 1.24 | 70 |
| 2026-12-18 | 6k | 5k | 0.79 | 271 |
| 2027-01-15 | 33k | 20k | 0.61 | 136 |
| 2027-03-19 | 2k | 2k | 0.72 | 11 |
| 2027-06-17 | 198 | 292 | 1.47 | 31 |
| 2027-12-17 | 4k | 3k | 0.62 | 4 |
| 2028-01-21 | 51k | 3k | 0.05 | 367 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.