Charles River Laboratories International Inc
Charles River Laboratories International Inc (CRL) Historical Volatility
CRL 30-day historical volatility is 34%. This ranks in the 16th percentile of readings over the past year.
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Tracking CRL historical volatility helps you see how much Charles River Laboratories International 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, Charles River Laboratories International Inc's HV tells you what really happened. Use our scanner to monitor CRL 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 CRL 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Charles River Laboratories International 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.
Charles River Laboratories International, Inc., a non-clinical contract research organization, provides drug discovery, non-clinical development, and safety testing services in the United States, Europe, Canada, the Asia Pacific, and internationally. It operates through three segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Solutions (Manufacturing). The RMS segment produces and sells rodent research model strains and purpose-bred rats and mice for use by researchers. This segment also provides a range of services to assist its clients in supporting the use of research models in research and screening non-clinical drug candidates, including research models, genetically engineered models and services, insourcing solutions, and research animal diagnostic services.
The DSA segment offers early and in vivo discovery services for the identification and validation of novel targets, chemical compounds, and antibodies through delivery of non-clinical drug and therapeutic candidates ready for safety assessment; and safety assessment services, such as toxicology, pathology, safety pharmacology, bioanalysis, drug metabolism, and pharmacokinetics services. The Manufacturing segment provides in vitro methods for conventional and rapid quality control testing of sterile and non-sterile pharmaceuticals and consumer products. This segment also offers specialized testing of biologics that are outsourced by pharmaceutical and biotechnology companies; and avian vaccine services that provide specific-pathogen-free (SPF) fertile chicken eggs, SPF chickens, and diagnostic products used to manufacture vaccines. The company also provides contract vivarium operation services to biopharmaceutical clients. Charles River Laboratories International, Inc. was founded in 1947 and is headquartered in Wilmington, Massachusetts.
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 Charles River Laboratories International Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where CRL HV is running hot, cold, or in line. Make the CRL 30 day historical volatility — and every other window — work for your edge instead of against it.
As of September 25, 2026
As of September 25, 2026
See how volatility has moved over time
Track CRL historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.
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