DGX Options Chain Analysis

Delayed CBOE data, snapshot 2026-08-18. Spot $235.52.

Put/Call (OI)

0.77

6k P / 8k C

Put/Call (Volume)

0.63

27 P / 43 C today

30d ATM IV

19%

annualized implied move

Call wall

$240

1k contracts

Put wall

$210

2k contracts

Tail hedging

2.7×

deep-OTM puts vs calls

What the positioning says

●Call wall at $240 (1k contracts), 2% above spot — the upside strike the crowd is already parked on; often acts as near-term resistance.
●Put wall at $210 (2k contracts), 11% below spot — the hedge floor; often acts as support.
●Deep-OTM put open interest is 2.7× deep-OTM call OI — an institutional hedging ladder sits under this stock.
●30-day ATM implied volatility is 19% — 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.

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 today
2026-08-21	5k	5k	1.03	11
2026-09-18	1k	388	0.36	35
2026-11-20	2k	777	0.43	19
2027-02-19	322	57	0.18	5

Source: CBOE delayed quotes, refreshed daily after US market close. Open interest is exchange-reported and lags one session. Research, not investment advice.