ARM Options Chain Analysis

As of previous close (2026-10-02) · OPRA historical data

Spot $308.2 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

1.08

459k P / 426k C

Put/Call (Volume)

0.48

39k P / 81k C that session

30d ATM IV

68%

annualized implied move

Call wall

$320

31k contracts

Put wall

$200

28k contracts

Tail hedging

2.5×

deep-OTM puts vs calls

What the positioning says

●Call wall at $320 (31k contracts), 4% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $200 (28k contracts), 35% below spot — the hedge floor; often acts as support.
●Deep-OTM put open interest is 2.5× deep-OTM call OI — an institutional hedging ladder sits under this stock.
●30-day ATM implied volatility is 68% — the market prices very large moves; option premium is expensive.

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 2026-10-30. A steep left side = expensive downside protection.

Open interest by expiry

Expiry	Call OI	Put OI	P/C	Volume that session
2026-10-09	16k	8k	0.50	32k
2026-10-16	57k	56k	0.99	16k
2026-10-23	3k	4k	1.42	2k
2026-10-30	4k	6k	1.64	3k
2026-11-06	762	1k	1.94	622
2026-11-13	60	26	0.43	187
2026-11-20	55k	41k	0.75	5k
2026-12-18	60k	85k	1.41	3k
2027-01-15	59k	106k	1.78	2k
2027-02-19	0	0	—	56
2027-03-19	23k	24k	1.04	1k
2027-04-16	3k	6k	2.01	381
2027-06-17	61k	41k	0.67	386
2027-09-17	3k	7k	2.06	87
2027-12-17	9k	16k	1.82	118
2028-01-21	20k	21k	1.03	1k
2028-06-16	1k	2k	1.26	42
2028-12-15	4k	6k	1.63	302
2029-01-19	839	358	0.43	130

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.