Delayed CBOE data, snapshot 2026-08-18. Spot $254.17.
Put/Call (OI)
0.44
8k P / 17k C
Put/Call (Volume)
0.38
123 P / 320 C today
30d ATM IV
24%
annualized implied move
Call wall
$260
4k contracts
Put wall
$230
3k contracts
Tail hedging
3.9×
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 | 10k | 5k | 0.51 | 271 |
| 2026-09-18 | 4k | 2k | 0.43 | 151 |
| 2026-10-16 | 0 | 0 | — | 6 |
| 2026-11-20 | 2k | 631 | 0.29 | 12 |
| 2026-12-18 | 243 | 113 | 0.47 | 2 |
| 2027-03-19 | 885 | 12 | 0.01 | 1 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.