Delayed CBOE data, snapshot 2026-08-18. Spot $250.33.
Put/Call (OI)
0.77
124k P / 162k C
Put/Call (Volume)
0.21
3k P / 16k C today
30d ATM IV
25%
annualized implied move
Call wall
$270
23k contracts
Put wall
$220
14k contracts
Tail hedging
2.2×
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 | 37k | 26k | 0.69 | 13k |
| 2026-08-28 | 1k | 1k | 1.21 | 631 |
| 2026-09-04 | 2k | 838 | 0.51 | 171 |
| 2026-09-11 | 493 | 505 | 1.02 | 129 |
| 2026-09-18 | 38k | 17k | 0.44 | 2k |
| 2026-09-25 | 233 | 80 | 0.34 | 147 |
| 2026-10-02 | 12 | 51 | 4.25 | 189 |
| 2026-10-16 | 10k | 11k | 1.10 | 360 |
| 2026-11-20 | 9k | 7k | 0.77 | 357 |
| 2026-12-18 | 14k | 9k | 0.64 | 133 |
| 2027-01-15 | 25k | 24k | 0.92 | 309 |
| 2027-02-19 | 2k | 2k | 1.19 | 252 |
| 2027-03-19 | 4k | 5k | 1.08 | 236 |
| 2027-06-17 | 8k | 10k | 1.30 | 1k |
| 2027-09-17 | 3k | 3k | 1.17 | 614 |
| 2028-01-21 | 8k | 8k | 1.00 | 424 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.