Delayed CBOE data, snapshot 2026-08-18. Spot $225.5.
Put/Call (OI)
0.83
9k P / 11k C
Put/Call (Volume)
0.72
234 P / 327 C today
30d ATM IV
28%
annualized implied move
Call wall
$230
2k contracts
Put wall
$185
2k contracts
Tail hedging
3.0×
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 | 2k | 4k | 1.52 | 147 |
| 2026-09-18 | 3k | 2k | 0.59 | 325 |
| 2026-10-16 | 2k | 787 | 0.35 | 9 |
| 2026-12-18 | 440 | 359 | 0.82 | 13 |
| 2027-01-15 | 2k | 908 | 0.47 | 47 |
| 2027-03-19 | 302 | 927 | 3.07 | 8 |
| 2027-06-17 | 65 | 42 | 0.65 | 6 |
| 2028-01-21 | 340 | 374 | 1.10 | 6 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.