Delayed CBOE data, snapshot 2026-08-18. Spot $43.35.
Put/Call (OI)
0.72
97k P / 134k C
Put/Call (Volume)
0.57
4k P / 6k C today
30d ATM IV
37%
annualized implied move
Call wall
$55
28k contracts
Put wall
$37.5
8k contracts
Tail hedging
0.4×
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 | 12k | 7k | 0.57 | 4k |
| 2026-08-28 | 1k | 2k | 1.59 | 711 |
| 2026-09-04 | 782 | 659 | 0.84 | 349 |
| 2026-09-11 | 550 | 243 | 0.44 | 79 |
| 2026-09-18 | 62k | 38k | 0.61 | 783 |
| 2026-09-25 | 56 | 126 | 2.25 | 52 |
| 2026-10-02 | 4 | 39 | 9.75 | 14 |
| 2026-12-18 | 10k | 6k | 0.58 | 566 |
| 2027-01-15 | 30k | 23k | 0.75 | 3k |
| 2027-03-19 | 4k | 3k | 0.91 | 177 |
| 2027-06-17 | 871 | 3k | 3.78 | 24 |
| 2028-01-21 | 12k | 14k | 1.14 | 247 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.