Delayed CBOE data, snapshot 2026-08-18. Spot $240.29.
Put/Call (OI)
0.85
9k P / 10k C
Put/Call (Volume)
2.81
329 P / 117 C today
30d ATM IV
32%
annualized implied move
Call wall
$250
1k contracts
Put wall
$160
1k contracts
Tail hedging
4.3×
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 | 6k | 6k | 1.00 | 159 |
| 2026-09-18 | 2k | 740 | 0.40 | 265 |
| 2026-11-20 | 798 | 844 | 1.06 | 4 |
| 2027-01-15 | 1k | 860 | 0.77 | 14 |
| 2027-02-19 | 192 | 278 | 1.45 | 4 |
| 2027-05-21 | 0 | 0 | — | 0 |
| 2027-08-20 | 0 | 0 | — | 0 |
| 2027-11-19 | 0 | 0 | — | 0 |
| 2028-01-21 | 425 | 137 | 0.32 | 0 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.