MKSI Options Chain Analysis

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

Spot $279.15 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

0.42

5k P / 12k C

Put/Call (Volume)

1.94

165 P / 85 C that session

30d ATM IV

51%

annualized implied move

Call wall

$340

1k contracts

Put wall

$220

1k contracts

Tail hedging

0.5×

deep-OTM puts vs calls

What the positioning says

●Bullish positioning: only 0.42 puts per call outstanding.
●Call wall at $340 (1k contracts), 22% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $220 (1k contracts), 21% below spot — the hedge floor; often acts as support.
●Deep-OTM call OI is 2.0× deep-OTM put OI — speculative upside positioning dominates the tails.

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	6k	3k	0.47	71
2026-11-20	1k	487	0.46	127
2026-12-18	3k	1k	0.42	10
2027-01-15	618	178	0.29	25
2027-02-19	1k	209	0.18	5
2027-04-16	23	36	1.57	0
2027-05-21	443	305	0.69	3
2027-08-20	124	23	0.19	1
2027-11-19	302	70	0.23	8

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.