AON Options Chain Analysis

As of previous close (2026-10-05) · OPRA historical data

Spot $271.44 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

0.79

5k P / 6k C

Put/Call (Volume)

0.48

232 P / 488 C that session

30d ATM IV

33%

annualized implied move

Call wall

$360

651 contracts

Put wall

$260

928 contracts

Tail hedging

0.0×

deep-OTM puts vs calls

What the positioning says

●Call wall at $360 (651 contracts), 33% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $260 (928 contracts), 4% below spot — the hedge floor; often acts as support.
●Deep-OTM call OI is 26.1× 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 2026-11-20. A steep left side = expensive downside protection.

Open interest by expiry

Expiry	Call OI	Put OI	P/C	Volume that session
2026-10-16	3k	2k	0.68	450
2026-11-20	718	1k	1.71	143
2026-12-18	165	693	4.20	22
2027-01-15	2k	1k	0.51	61
2027-04-16	629	226	0.36	44

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.