ROK Options Chain Analysis

Delayed CBOE data, snapshot 2026-08-18. Spot $447.17.

Put/Call (OI)

1.16

13k P / 11k C

Put/Call (Volume)

11.51

1k P / 106 C today

30d ATM IV

30%

annualized implied move

Call wall

$560

2k contracts

Put wall

$380

3k contracts

Tail hedging

1.5×

deep-OTM puts vs calls

What the positioning says

●Defensive positioning: 1.16 puts outstanding per call — holders are hedging rather than selling.
●Call wall at $560 (2k contracts), 25% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $380 (3k contracts), 15% below spot — the hedge floor; often acts as support.

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	5k	6k	1.16	1k
2026-09-18	209	4k	18.13	35
2026-10-16	820	766	0.93	16
2026-11-20	2k	856	0.40	7
2027-01-15	1k	213	0.18	11
2027-02-19	154	83	0.54	1
2027-05-21	667	264	0.40	3
2027-08-20	48	216	4.50	1
2027-11-19	121	89	0.74	0
2028-01-21	155	82	0.53	1

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