Exagen Inc

XGNNASDAQ · USD
8.13USD0.00 (-2.05%)
2510

Exagen Inc (XGN) Historical Volatility

XGN 30-day historical volatility is 57%. This ranks in the 35th percentile of readings over the past year.

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

Exagen Inc. develops and commercializes various testing products based on its cell-bound complement activation products technology under the AVISE brand in the United States. It enables rheumatologists to care for patients through the diagnosis, prognosis, and monitoring of autoimmune and autoimmune-related diseases, including systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). Its lead testing product is AVISE CTD that enables differential diagnosis for patients presenting with symptoms indicative of various connective tissue diseases (CTDs) and other related diseases with overlapping symptoms.

The company offers AVISE Lupus that measures activation of the complement system by quantifying the level of B-cell C4d and erythrocyte bound C4d in the patient's blood; and AVISE APS, which consists of a panel of autoantibody tests that aids in the diagnosis and management of APS. In addition, it provides AVISE SLE Prognostic, a panel of autoantibodies for assessing the potential for complications affecting the kidney, brain, and cardiovascular system; AVISE Vasculitis AAV, which utilizes a testing panel of individual analytes to provide physicians with results in the assessment and monitoring of anti-neutrophil cytoplasmic antibody and associated vasculitis; AVISE Anti-CarP test, which identifies RA patients with severe disease; and AVISE PC4d to measure platelet- bound C4d. Further, the company offers AVISE SLE Monitor, a biomarker blood test; AVISE MTX, a patented and validated blood test; and AVISE HCQ, a blood test to monitor levels of hydroxychloroquine. It has a research collaboration and license agreement with Allegheny Health Network (AHN) Research Institute to develop novel patented biomarkers. The company was formerly known as Exagen Diagnostics, Inc. and changed its name to Exagen Inc. in January 2019. Exagen Inc. was incorporated in 2002 and is headquartered in Vista, California.

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 Exagen Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where XGN HV is running hot, cold, or in line. Make the XGN 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 30, 2026

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

As of September 30, 2026

See how volatility has moved over time

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

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