Main Street Capital (MAIN) Options Chain

NYSE: MAINFinanceFinance/Investors ServicesUSD

53.74-0.73 (-1.34%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $53.74
Put/call ratio (OI): 0.47
Put/call ratio (volume): 2.80
ATM implied volatility: 23.2%
Expected move: ±$4.13
Open interest (C / P): 772 / 361

MAIN options summary

The MAIN options chain for the November 20, 2026 expiration lists 4 call and 4 put contracts, with 40 days until expiration. Open interest stands at 772 calls and 361 puts, a put/call ratio of 0.47, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $54.70 strike is 23.2%, which implies the market expects a move of about ±$4.13 (7.7%) in Main Street Capital stock by expiration.

The most open interest sits at the $59.70 call (713 contracts) and the $49.70 put (197 contracts).

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

MAIN options chain · November 20, 2026

MAIN 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
—	—	—	—	—	—	49.70	0.35	0.50	0.40	26.9%	6	197
—	—	—	—	—	—	50.00	0.25	0.45	0.40	24.6%	3	0
MAIN $53.74
56	4	20.4%	1.05	0.85	1.05	54.70	2.00	2.40	2.10	25.9%	12	159
713	4	22.2%	0.10	0.05	0.15	59.70	5.70	6.50	6.05	32.3%	7	5
0	1	35.6%	0.50	0.30	0.65	60.00	—	—	—	—	—	—
3	1	37.1%	0.06	0.00	0.05	69.70	—	—	—	—	—	—

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 MAIN put/call ratio?

For the November 20, 2026 expiration, the MAIN put/call ratio based on open interest is 0.47 (361 puts vs 772 calls), and 2.80 based on today's volume. A ratio above 1 means more puts than calls.

What is MAIN's implied volatility?

At-the-money implied volatility for MAIN options expiring November 20, 2026 is about 23.2%, an annualized estimate of how much the market expects Main Street Capital stock to move.

How many MAIN option expiration dates are there?

MAIN has 6 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.