Delayed CBOE data, snapshot 2026-08-18. Spot $418.88.
Put/Call (OI)
0.96
63k P / 66k C
Put/Call (Volume)
1.95
5k P / 3k C today
30d ATM IV
26%
annualized implied move
Call wall
$440
11k contracts
Put wall
$300
6k contracts
Tail hedging
12.2×
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 | 11k | 14k | 1.30 | 3k |
| 2026-08-28 | 1k | 2k | 1.88 | 885 |
| 2026-09-04 | 375 | 2k | 4.68 | 116 |
| 2026-09-11 | 336 | 236 | 0.70 | 178 |
| 2026-09-18 | 21k | 14k | 0.66 | 1k |
| 2026-09-25 | 79 | 41 | 0.52 | 19 |
| 2026-10-02 | 27 | 18 | 0.67 | 21 |
| 2026-10-16 | 9k | 7k | 0.81 | 763 |
| 2026-11-20 | 635 | 230 | 0.36 | 1k |
| 2026-12-18 | 3k | 5k | 1.51 | 81 |
| 2027-01-15 | 13k | 14k | 1.08 | 331 |
| 2027-03-19 | 2k | 990 | 0.64 | 182 |
| 2027-06-17 | 3k | 2k | 0.68 | 128 |
| 2028-01-21 | 2k | 2k | 0.99 | 206 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.