Delayed CBOE data, snapshot 2026-08-18. Spot $335.6.
Put/Call (OI)
0.87
81k P / 92k C
Put/Call (Volume)
1.04
4k P / 4k C today
30d ATM IV
58%
annualized implied move
Call wall
$500
6k contracts
Put wall
$300
11k contracts
Tail hedging
0.8×
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 | 13k | 10k | 0.78 | 3k |
| 2026-08-28 | 3k | 4k | 1.42 | 2k |
| 2026-09-04 | 947 | 2k | 1.79 | 360 |
| 2026-09-11 | 360 | 357 | 0.99 | 127 |
| 2026-09-18 | 18k | 15k | 0.81 | 1k |
| 2026-09-25 | 129 | 224 | 1.74 | 169 |
| 2026-10-02 | 61 | 44 | 0.72 | 31 |
| 2026-10-16 | 10k | 7k | 0.66 | 418 |
| 2026-12-18 | 11k | 8k | 0.68 | 484 |
| 2027-01-15 | 19k | 22k | 1.11 | 343 |
| 2027-03-19 | 4k | 3k | 0.91 | 140 |
| 2027-06-17 | 3k | 3k | 0.91 | 199 |
| 2028-01-21 | 9k | 7k | 0.79 | 223 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.