Main Street Capital Corp

MAINNYSE · USD
56.19USD-0.84 (-1.48%)
567

Main Street Capital Corp (MAIN) Historical Volatility

MAIN 30-day historical volatility is 17%. This ranks in the 1th percentile of readings over the past year.

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Tracking MAIN historical volatility helps you see how much Main Street Capital Corp's stock price has actually moved over past periods, giving you a baseline to judge whether current option premiums are fair, cheap, or expensive. While implied volatility tells you what the market expects, Main Street Capital Corp's HV tells you what really happened. Use our scanner to monitor MAIN 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of an underlying's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. The MAIN 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Main Street Capital Corp's HV to its implied volatility reveals the volatility risk premium — when IV sits well above HV, option sellers tend to have an edge; when HV runs hot relative to IV, buyers may be underpaying for movement.

Main Street Capital Corporation is a business development company specializes in equity capital to lower middle market companies. The firm specializing in recapitalizations, management buyouts, refinancing, family estate planning, management buyouts, refinancing, industry consolidation, mature, later stage emerging growth. The firm also provides debt capital to middle market companies for acquisitions, management buyouts, growth financings, recapitalizations and refinancing. The firm seeks to partner with entrepreneurs, business owners and management teams and generally provides one stop financing alternatives within its lower middle market portfolio.

It prefers to invest in air freight and logistics, auto components, building products, chemicals, commercial services, computers, construction and engineering, consumer finance, consumer services, electronic equipment, energy equipment and services, financial services, health care equipment, health care providers, hotels, restaurants, and leisure, internet software and services, IT Services, machinery, oil, gas and consumable fuels, paper and forest products, professional and industrial services, road and rail, software, specialty retail, telecommunication, consumer discretionary, energy, materials, technology, and transportation. The firm typically invests in lower middle market companies generally with annual revenues between $5 million and $300 million. It prefers to invest in ranging between $2 million and $75 million in equity investment and enterprise value in ranging between $3 million and $20 million. The firm typically prefers to invest in the range of $5 million and $50 million per transaction in debt investment value and in the range of $1 million and $20 million in annual EBITDA. The firm's middle market debt investments are made in businesses that are generally larger in size than its lower middle market portfolio companies. It takes 5 percent minority and up to 50 percent majority equity investments. Main Street Capital Corporation was founded in 2007 and is based in Houston, Texas with an additional office in Chojnów, Poland.

Sizing a long premium trade, modeling a covered call, or hunting volatility arbitrage all come back to one question: how much has the stock actually moved? Our scanner puts Main Street Capital Corp's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where MAIN HV is running hot, cold, or in line. Make the MAIN 30 day historical volatility — and every other window — work for your edge instead of against it.

IV vs HV
Implied Volatility (IV) vs Historical Volatility (HV) over the past month.

As of September 17, 2026

IV - HV Difference
Difference between IV and HV over time. Positive values indicate IV > HV.

As of September 17, 2026

See how volatility has moved over time

Track MAIN historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

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