INSM Options Chain Analysis

As of previous close (2026-10-01) · OPRA historical data

Spot $115.68 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

0.70

37k P / 52k C

Put/Call (Volume)

0.44

539 P / 1k C that session

30d ATM IV

48%

annualized implied move

Call wall

$130

14k contracts

Put wall

$80

17k contracts

Tail hedging

0.7×

deep-OTM puts vs calls

What the positioning says

●Call wall at $130 (14k contracts), 12% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $80 (17k contracts), 31% 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 2026-10-16. 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 that session
2026-10-16	3k	899	0.32	1k
2026-11-20	13k	16k	1.30	412
2027-01-15	28k	15k	0.54	167
2027-02-19	234	76	0.32	9
2027-03-19	2k	2k	0.95	3
2027-05-21	164	43	0.26	6
2027-08-20	50	1	0.02	6
2027-11-19	289	11	0.04	0
2028-01-21	5k	2k	0.34	6
2028-12-15	19	11	0.58	10
2029-01-19	13	2	0.15	0

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.