Delayed CBOE data, snapshot 2026-08-18. Spot $27.85.
Put/Call (OI)
1.85
2.0M P / 1.1M C
Put/Call (Volume)
1.82
34k P / 19k C today
30d ATM IV
18%
annualized implied move
Call wall
$28
293k contracts
Put wall
$20
580k contracts
Tail hedging
11.8×
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 | 341k | 148k | 0.43 | 11k |
| 2026-08-28 | 2k | 1k | 0.67 | 2k |
| 2026-09-04 | 322 | 160 | 0.50 | 9 |
| 2026-09-11 | 278 | 37 | 0.13 | 52 |
| 2026-09-18 | 230k | 423k | 1.84 | 3k |
| 2026-09-25 | 151 | 40 | 0.26 | 31 |
| 2026-10-02 | 44 | 0 | 0.00 | 96 |
| 2026-10-16 | 164k | 583k | 3.56 | 13k |
| 2026-11-20 | 94k | 49k | 0.52 | 4k |
| 2026-12-18 | 27k | 286k | 10.67 | 6k |
| 2027-01-15 | 111k | 125k | 1.13 | 9k |
| 2027-02-19 | 667 | 82 | 0.12 | 3k |
| 2027-03-19 | 28k | 181k | 6.44 | 52 |
| 2027-04-16 | 762 | 22k | 28.22 | 13 |
| 2027-05-21 | 13k | 25k | 1.91 | 153 |
| 2027-06-17 | 5k | 96k | 19.30 | 108 |
| 2027-07-16 | 8k | 1k | 0.19 | 304 |
| 2028-01-21 | 27k | 24k | 0.88 | 242 |
| 2028-06-16 | 980 | 161 | 0.16 | 29 |
| 2028-09-15 | 1k | 530 | 0.38 | 118 |
| 2028-12-15 | 11k | 2k | 0.14 | 184 |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.