GRMN Options Chain Analysis

As of previous close (2026-10-16) · OPRA historical data

Spot $284.79 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

0.62

5k P / 9k C

Put/Call (Volume)

2.71

460 P / 170 C that session

30d ATM IV

44%

annualized implied move

Call wall

$310

1k contracts

Put wall

$250

1k contracts

Tail hedging

1.9×

deep-OTM puts vs calls

What the positioning says

●Bullish positioning: only 0.62 puts per call outstanding.
●Call wall at $310 (1k contracts), 9% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $250 (1k contracts), 12% 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 2026-11-20. A steep left side = expensive downside protection.

Open interest by expiry

Expiry	Call OI	Put OI	P/C	Volume that session
2026-11-20	258	1k	5.77	449
2026-12-18	3k	899	0.35	29
2027-01-15	783	563	0.72	46
2027-02-19	61	53	0.87	0
2027-04-16	34	11	0.32	31
2027-05-21	98	157	1.60	2
2027-08-20	217	91	0.42	1
2027-11-19	1k	97	0.07	3

Source: Cboe end-of-session option chains, summarized after each US market close and published from the following trading day — OPRA historical data. Under the OPRA plan options data becomes historical, and freely publishable, at the opening of the next trading session; data from the session in progress is never displayed or served here. Open interest is exchange-reported once a day. Research, not investment advice.