Delayed CBOE data, snapshot 2026-08-18. Spot $253.7.
Put/Call (OI)
0.59
270k P / 460k C
Put/Call (Volume)
1.04
17k P / 16k C today
30d ATM IV
53%
annualized implied move
Call wall
$300
24k contracts
Put wall
$210
32k contracts
Tail hedging
0.6×
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 | 78k | 34k | 0.44 | 14k |
| 2026-08-28 | 6k | 8k | 1.40 | 2k |
| 2026-09-04 | 3k | 4k | 1.45 | 1k |
| 2026-09-11 | 2k | 3k | 1.27 | 796 |
| 2026-09-18 | 71k | 42k | 0.59 | 5k |
| 2026-09-25 | 2k | 2k | 0.89 | 352 |
| 2026-10-02 | 198 | 547 | 2.76 | 429 |
| 2026-10-16 | 18k | 53k | 2.92 | 2k |
| 2026-11-20 | 41k | 11k | 0.26 | 725 |
| 2026-12-18 | 47k | 24k | 0.52 | 4k |
| 2027-01-15 | 80k | 37k | 0.47 | 692 |
| 2027-02-19 | 2k | 2k | 1.21 | 157 |
| 2027-03-19 | 6k | 8k | 1.18 | 235 |
| 2027-06-17 | 20k | 13k | 0.65 | 701 |
| 2027-12-17 | 17k | 10k | 0.59 | 391 |
| 2028-01-21 | 65k | 17k | 0.27 | 877 |
| 2028-12-15 | 999 | 856 | 0.86 | 139 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.