Delayed CBOE data, snapshot 2026-08-18. Spot $201.75.
Put/Call (OI)
0.81
139k P / 172k C
Put/Call (Volume)
0.66
6k P / 10k C today
30d ATM IV
49%
annualized implied move
Call wall
$210
12k contracts
Put wall
$130
11k contracts
Tail hedging
3.6×
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 | 33k | 24k | 0.73 | 7k |
| 2026-08-28 | 4k | 3k | 0.71 | 2k |
| 2026-09-04 | 4k | 2k | 0.62 | 494 |
| 2026-09-11 | 993 | 1k | 1.10 | 223 |
| 2026-09-18 | 33k | 25k | 0.75 | 2k |
| 2026-09-25 | 627 | 433 | 0.69 | 471 |
| 2026-10-02 | 45 | 26 | 0.58 | 68 |
| 2026-10-16 | 8k | 7k | 0.87 | 1k |
| 2026-11-20 | 9k | 10k | 1.03 | 720 |
| 2026-12-18 | 9k | 9k | 1.03 | 419 |
| 2027-01-15 | 43k | 37k | 0.84 | 610 |
| 2027-03-19 | 5k | 4k | 0.88 | 316 |
| 2027-06-17 | 7k | 7k | 1.12 | 384 |
| 2028-01-21 | 16k | 10k | 0.63 | 426 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.