Delayed CBOE data, snapshot 2026-08-18. Spot $507.9.
Put/Call (OI)
1.14
1.7M P / 1.5M C
Put/Call (Volume)
0.67
229k P / 343k C today
30d ATM IV
54%
annualized implied move
Call wall
$600
44k contracts
Put wall
$400
82k contracts
Tail hedging
2.8×
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 |
|---|---|---|---|---|
| 2026-08-19 | 10k | 8k | 0.85 | 50k |
| 2026-08-21 | 218k | 230k | 1.06 | 82k |
| 2026-08-24 | 2k | 2k | 1.10 | 7k |
| 2026-08-26 | 2k | 2k | 1.01 | 3k |
| 2026-08-28 | 33k | 31k | 0.92 | 31k |
| 2026-08-31 | 0 | 0 | — | 1k |
| 2026-09-04 | 26k | 38k | 1.50 | 9k |
| 2026-09-11 | 24k | 27k | 1.14 | 11k |
| 2026-09-18 | 190k | 253k | 1.33 | 25k |
| 2026-09-25 | 16k | 12k | 0.75 | 3k |
| 2026-10-02 | 3k | 928 | 0.32 | 6k |
| 2026-10-16 | 68k | 76k | 1.12 | 11k |
| 2026-11-20 | 84k | 85k | 1.01 | 10k |
| 2026-12-18 | 136k | 149k | 1.10 | 9k |
| 2027-01-15 | 223k | 304k | 1.36 | 20k |
| 2027-02-19 | 8k | 13k | 1.64 | 6k |
| 2027-03-19 | 55k | 83k | 1.53 | 7k |
| 2027-06-17 | 86k | 111k | 1.30 | 11k |
| 2027-09-17 | 23k | 24k | 1.03 | 6k |
| 2027-12-17 | 77k | 75k | 0.97 | 5k |
| 2028-01-21 | 86k | 89k | 1.03 | 3k |
| 2028-06-16 | 22k | 15k | 0.70 | 878 |
| 2028-12-15 | 83k | 55k | 0.67 | 3k |
Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.