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

After hours: 53.74 -0.02%

Expiration date

Expiration: Jan 21, 2028
Days to expiration: 469
Share price: $53.74
Put/call ratio (OI): 0.54
Put/call ratio (volume): 2.87
ATM implied volatility: 24.1%
Expected move: ±$14.66
Open interest (C / P): 229 / 124

MAIN options summary

The MAIN options chain for the January 21, 2028 expiration lists 9 call and 12 put contracts, with 469 days until expiration. Open interest stands at 229 calls and 124 puts, a put/call ratio of 0.54, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $54.70 strike is 24.1%, which implies the market expects a move of about ±$14.66 (27.3%) in Main Street Capital stock by expiration.

The most open interest sits at the $59.70 call (74 contracts) and the $49.70 put (72 contracts).

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

MAIN options chain · January 21, 2028

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
—	—	—	—	—	—	29.70	0.00	2.85	0.45	60.6%	—	1
—	—	—	—	—	—	30.00	0.00	1.55	0.45	48.0%	1	0
1	—	45.8%	20.74	16.90	21.50	34.70	0.00	3.00	0.85	49.8%	—	1
—	—	—	—	—	—	39.70	1.15	2.05	1.60	33.2%	7	7
—	—	—	—	—	—	40.00	0.00	3.20	1.20	39.9%	—	5
—	—	—	—	—	—	44.70	2.30	3.40	2.66	31.7%	5	19
—	—	—	—	—	—	45.00	0.35	3.90	2.35	33.7%	—	4
3	1	16.4%	7.38	5.00	6.20	49.70	3.70	5.60	4.60	32.0%	20	72
—	—	—	—	—	—	50.00	1.75	5.00	3.50	28.7%	—	4
MAIN $53.74
11	1	20.7%	3.32	2.00	4.60	54.70	5.50	7.20	5.01	27.5%	5	10
1	—	22.8%	4.65	3.80	5.00	55.00	4.20	7.60	6.03	28.4%	5	0
74	8	19.0%	0.75	0.75	2.45	59.70	8.20	11.20	8.50	30.8%	—	1
63	—	26.4%	3.40	1.35	4.10	60.00	—	—	—	—	—	—
72	3	22.3%	0.88	0.00	2.00	64.70	—	—	—	—	—	—
2	—	29.1%	1.50	0.00	3.40	65.00	—	—	—	—	—	—
2	2	30.7%	0.45	0.00	2.80	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 January 21, 2028 expiration, the MAIN put/call ratio based on open interest is 0.54 (124 puts vs 229 calls), and 2.87 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 January 21, 2028 is about 24.1%, 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.