Delayed CBOE data, snapshot 2026-08-18. Spot $236.1.
Put/Call (OI)
1.46
22k P / 15k C
Put/Call (Volume)
1.47
8k P / 5k C today
30d ATM IV
38%
annualized implied move
Call wall
$250
2k contracts
Put wall
$220
8k contracts
Tail hedging
1.9×
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 | 4k | 3k | 0.91 | 2k |
| 2026-08-28 | 521 | 592 | 1.14 | 511 |
| 2026-09-04 | 26 | 78 | 3.00 | 2k |
| 2026-09-11 | 22 | 100 | 4.55 | 2k |
| 2026-09-18 | 4k | 8k | 2.04 | 6k |
| 2026-09-25 | 12 | 3k | 261.50 | 13 |
| 2026-10-02 | 5 | 0 | 0.00 | 203 |
| 2026-11-20 | 641 | 1k | 1.56 | 332 |
| 2026-12-18 | 1k | 2k | 1.16 | 49 |
| 2027-01-15 | 3k | 3k | 0.99 | 124 |
| 2027-02-19 | 202 | 182 | 0.90 | 1 |
| 2027-03-19 | 459 | 329 | 0.72 | 14 |
| 2027-06-17 | 561 | 440 | 0.78 | 79 |
| 2028-01-21 | 785 | 681 | 0.87 | 20 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.