AON Options Chain Analysis

As of previous close (2026-09-02) · OPRA historical data

Spot $326.3 at that close. Nothing on this page comes from the session in progress.

Put/Call (OI)

0.62

3k P / 5k C

Put/Call (Volume)

1.49

961 P / 647 C that session

30d ATM IV

24%

annualized implied move

Call wall

$380

771 contracts

Put wall

$320

739 contracts

Tail hedging

0.1×

deep-OTM puts vs calls

What the positioning says

●Bullish positioning: only 0.62 puts per call outstanding.
●Call wall at $380 (771 contracts), 16% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $320 (739 contracts), 2% below spot — the hedge floor; often acts as support.
●Deep-OTM call OI is 7.4× deep-OTM put OI — speculative upside positioning dominates the tails.
●30-day ATM implied volatility is 24% — calm pricing; option premium is cheap.

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 2026-09-18. A steep left side = expensive downside protection.

Open interest by expiry

Expiry	Call OI	Put OI	P/C	Volume that session
2026-09-18	1k	551	0.45	445
2026-10-16	2k	2k	0.91	181
2026-11-20	71	93	1.31	831
2027-01-15	2k	422	0.27	101
2027-04-16	31	100	3.23	50

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.