Miami International (MIAX) Options Chain

NYSE: MIAXFinanceInvestment Bankers/Brokers/ServiceUSD

30.71+0.01 (+0.03%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $30.71
Put/call ratio (OI): 0.25
Put/call ratio (volume): 0.25
ATM implied volatility: 53.5%
Expected move: ±$5.44
Open interest (C / P): 1.33K / 339

MIAX options summary

The MIAX options chain for the November 20, 2026 expiration lists 4 call and 4 put contracts, with 40 days until expiration. Open interest stands at 1,334 calls and 339 puts, a put/call ratio of 0.25, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $30.00 strike is 53.5%, which implies the market expects a move of about ±$5.44 (17.7%) in Miami International stock by expiration.

The most open interest sits at the $45.00 call (700 contracts) and the $30.00 put (146 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

MIAX options chain · November 20, 2026

MIAX calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
—	—	—	—	—	—	20.00	0.00	0.65	0.05	95.2%	—	3
47	1	53.7%	2.68	2.20	2.90	30.00	1.70	1.95	1.82	53.3%	17	146
MIAX $30.71
171	14	53.6%	0.85	0.65	0.95	35.00	4.80	5.30	4.95	52.4%	6	138
416	33	52.1%	0.20	0.10	0.25	40.00	9.10	10.20	7.17	62.5%	4	52
700	62	78.9%	0.17	0.00	0.65	45.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the MIAX put/call ratio?

For the November 20, 2026 expiration, the MIAX put/call ratio based on open interest is 0.25 (339 puts vs 1,334 calls), and 0.25 based on today's volume. A ratio above 1 means more puts than calls.

What is MIAX's implied volatility?

At-the-money implied volatility for MIAX options expiring November 20, 2026 is about 53.5%, an annualized estimate of how much the market expects Miami International stock to move.

How many MIAX option expiration dates are there?

MIAX has 7 listed expiration dates, from Oct 16, 2026 to Dec 17, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.