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: Mar 19, 2027
Days to expiration: 159
Share price: $53.74
Put/call ratio (OI): 3.36
Put/call ratio (volume): 2.14
ATM implied volatility: 23.8%
Expected move: ±$8.44
Open interest (C / P): 1.43K / 4.80K

MAIN options summary

The MAIN options chain for the March 19, 2027 expiration lists 14 call and 16 put contracts, with 159 days until expiration. Open interest stands at 1,430 calls and 4,802 puts, a put/call ratio of 3.36, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $54.70 strike is 23.8%, which implies the market expects a move of about ±$8.44 (15.7%) in Main Street Capital stock by expiration.

The most open interest sits at the $60.00 call (335 contracts) and the $35.00 put (1.58K contracts).

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

MAIN options chain · March 19, 2027

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
0	—	54.9%	26.00	22.60	26.10	29.70	0.00	1.15	0.05	63.0%	4	7
—	—	—	—	—	—	30.00	0.10	0.20	0.12	49.7%	4	9
0	—	73.2%	20.30	17.40	21.10	34.70	—	—	—	—	—	—
—	—	—	—	—	—	35.00	0.00	1.05	0.40	57.3%	80	1,580
—	—	—	—	—	—	39.70	0.05	0.50	0.35	35.4%	2	27
—	—	—	—	—	—	40.00	0.00	0.50	0.40	34.7%	1	25
—	—	—	—	—	—	44.70	0.35	1.05	0.75	31.4%	8	177
1	—	58.7%	9.66	11.10	14.40	45.00	0.20	1.25	0.75	32.9%	9	185
20	6	30.6%	5.60	4.40	6.50	49.70	1.50	2.25	1.80	28.9%	7	237
8	3	36.7%	6.65	6.50	7.10	50.00	1.55	1.80	1.65	24.4%	1	318
MAIN $53.74
79	9	20.3%	2.17	1.80	2.45	54.70	3.20	4.40	4.07	27.3%	6	434
68	55	32.1%	3.67	3.10	4.00	55.00	2.75	4.40	3.39	26.1%	1	312
301	31	20.4%	0.68	0.55	0.95	59.70	6.10	8.00	6.21	29.4%	—	744
335	10	29.7%	1.97	1.20	2.00	60.00	5.30	6.90	6.35	17.9%	167	732
176	5	21.8%	0.30	0.05	0.40	64.70	—	—	—	—	—	—
146	9	28.9%	0.50	0.45	0.95	65.00	9.10	10.90	9.28	—	1	13
183	6	35.3%	0.15	0.00	0.95	69.70	—	—	—	—	—	—
112	1	35.6%	0.20	0.00	0.95	70.00	—	—	—	—	—	—
—	—	—	—	—	—	74.70	20.00	22.40	19.90	46.9%	—	1
1	1	48.3%	0.25	0.00	1.55	75.00	17.70	21.10	19.90	—	—	1

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 March 19, 2027 expiration, the MAIN put/call ratio based on open interest is 3.36 (4,802 puts vs 1,430 calls), and 2.14 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 March 19, 2027 is about 23.8%, 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.