Delayed CBOE data, snapshot 2026-08-18. Spot $505.51.
Put/Call (OI)
0.93
24k P / 26k C
Put/Call (Volume)
1.59
2k P / 1k C today
30d ATM IV
46%
annualized implied move
Call wall
$600
1k contracts
Put wall
$400
1k contracts
Tail hedging
0.9×
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 | 3k | 3k | 0.86 | 467 |
| 2026-08-28 | 816 | 3k | 3.54 | 972 |
| 2026-09-04 | 373 | 2k | 4.17 | 636 |
| 2026-09-11 | 115 | 638 | 5.55 | 266 |
| 2026-09-18 | 6k | 4k | 0.69 | 556 |
| 2026-09-25 | 339 | 476 | 1.40 | 514 |
| 2026-10-02 | 114 | 10 | 0.09 | 28 |
| 2026-11-20 | 1k | 2k | 1.42 | 29 |
| 2026-12-18 | 2k | 3k | 1.65 | 21 |
| 2027-01-15 | 7k | 5k | 0.64 | 8 |
| 2027-03-19 | 3k | 747 | 0.26 | 8 |
| 2027-06-17 | 826 | 905 | 1.10 | 6 |
| 2028-01-21 | 1k | 766 | 0.68 | 34 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.