Allegro Microsystems Inc

ALGMNASDAQ · USD
36.76USD0.00 (+4.64%)
577

Allegro Microsystems Inc (ALGM) Historical Volatility

ALGM 30-day historical volatility is 55%. This ranks in the 45th percentile of readings over the past year.

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Tracking ALGM historical volatility helps you see how much Allegro Microsystems Inc'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, Allegro Microsystems Inc's HV tells you what really happened. Use our scanner to monitor ALGM 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 ALGM 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Allegro Microsystems Inc'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.

Allegro MicroSystems, Inc. designs, develops, manufactures, and markets sensor integrated circuits (ICs) and application-specific analog power ICs for motion control and energy-efficient systems. Its products include magnetic sensor ICs, such as position, speed, and current sensor ICs; power ICs comprising motor driver ICs, and regulator and LED driver ICs; and photonic and 3D sensing components, including photodiodes, eye-safe lasers, and readout ICs for LiDAR applications. The company sells its products to original equipment manufacturers and suppliers primarily in the automotive and industrial markets through its direct sales force, third party distributors, independent sales representatives, and consignment.

It operates in the United States, rest of the Americas, Europe, Japan, Greater China, South Korea, and other Asian markets. The company was founded in 1990 and is headquartered in Manchester, New Hampshire. Allegro MicroSystems, Inc. is a subsidiary of Sanken Electric Co., Ltd.

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 Allegro Microsystems Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where ALGM HV is running hot, cold, or in line. Make the ALGM 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 25, 2026

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

As of September 25, 2026

See how volatility has moved over time

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

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