CASY Options Chain Analysis

Delayed CBOE data, snapshot 2026-08-18. Spot $868.

Put/Call (OI)

1.06

5k P / 4k C

Put/Call (Volume)

0.66

287 P / 432 C today

30d ATM IV

42%

annualized implied move

Call wall

$900

429 contracts

Put wall

$680

437 contracts

Tail hedging

3.2×

deep-OTM puts vs calls

What the positioning says

●Call wall at $900 (429 contracts), 4% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $680 (437 contracts), 22% below spot — the hedge floor; often acts as support.
●Deep-OTM put open interest is 3.2× deep-OTM call OI — an institutional hedging ladder sits under this stock.

Open interest by strike

All expiries combined. Amber lines mark the call and put walls; the dashed line is spot.

IV term structure

At-the-money implied volatility per expiry.

Volatility smile

IV by strike — expiry 2026-09-18. A steep left side = expensive downside protection.

30-day implied volatility history

Daily ATM IV (~30 DTE bucket) collected since March 2026. Rising IV into an event = the market bracing; collapsing IV after = the crush.

Open interest by expiry

Expiry	Call OI	Put OI	P/C	Volume today
2026-08-21	3k	2k	0.94	443
2026-09-18	388	347	0.89	136
2026-11-20	1k	2k	1.37	58
2027-02-19	156	149	0.96	82

Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.