Altimmune Inc

ALTNASDAQ · USD
3.26USD+0.02 (+0.47%)
159

Altimmune Inc (ALT) Historical Volatility

ALT 30-day historical volatility is 45%. This ranks in the 11th percentile of readings over the past year.

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

Altimmune, Inc., a clinical stage biopharmaceutical company, focuses on developing treatments for obesity and liver diseases. The company's lead product candidate, pemvidutide (proposed INN, formerly known as ALT-801), is a GLP-1/glucagon dual receptor agonist that is in Phase 1b trial for the treatment of obesity and non-alcoholic steatohepatitis. It is also developing HepTcell, an immunotherapeutic product candidate, which is in Phase 2 clinical trial for patients chronically infected with the hepatitis B virus. The company was formerly known as Vaxin Inc. and changed its name to Altimmune, Inc.

in September 2015. Altimmune, Inc. was founded in 1997 is headquartered in Gaithersburg, Maryland.

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 Altimmune Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where ALT HV is running hot, cold, or in line. Make the ALT 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 ALT historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.

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