Delayed CBOE data, snapshot 2026-08-18. Spot $218.
Put/Call (OI)
0.62
240k P / 386k C
Put/Call (Volume)
5.05
44k P / 9k C today
30d ATM IV
52%
annualized implied move
Call wall
$410
60k contracts
Put wall
$180
31k contracts
Tail hedging
0.5×
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 | 44k | 29k | 0.65 | 11k |
| 2026-08-28 | 3k | 5k | 1.42 | 4k |
| 2026-09-04 | 3k | 2k | 0.66 | 439 |
| 2026-09-11 | 2k | 789 | 0.35 | 206 |
| 2026-09-18 | 51k | 25k | 0.48 | 2k |
| 2026-09-25 | 147 | 1k | 10.12 | 583 |
| 2026-10-02 | 9 | 24 | 2.67 | 45 |
| 2026-10-16 | 5k | 3k | 0.63 | 617 |
| 2026-11-20 | 2k | 3k | 1.36 | 5k |
| 2026-12-18 | 33k | 20k | 0.61 | 6k |
| 2027-01-15 | 71k | 95k | 1.33 | 9k |
| 2027-03-19 | 8k | 6k | 0.73 | 1k |
| 2027-06-17 | 15k | 7k | 0.47 | 6k |
| 2028-01-21 | 109k | 42k | 0.38 | 7k |
| 2028-06-16 | 40k | 3k | 0.08 | 1k |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.