Carmax Inc
Carmax Inc (KMX) Historical Volatility
KMX 30-day historical volatility is 29%. This ranks in the 7th percentile of readings over the past year.
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Tracking KMX historical volatility helps you see how much Carmax 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, Carmax Inc's HV tells you what really happened. Use our scanner to monitor KMX 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 KMX 30 day historical volatility is one of the most widely watched readings because it balances responsiveness with stability. Comparing Carmax 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.
CarMax, Inc., together with its subsidiaries, operates as a retailer of used vehicles in the United States. The company operates through two segments, CarMax Sales Operations and CarMax Auto Finance. It offers customers a range of makes and models of used vehicles, including domestic, imported, and luxury vehicles, as well as hybrid and electric vehicles; and extended protection plans to customers at the time of sale, as well as sells vehicles that are approximately 10 years old and has more than 100,000 miles through wholesale auctions. The company also provides reconditioning and vehicle repair services; and financing alternatives for retail customers across a range of credit spectrum through its CarMax Auto Finance and arrangements with various financial institutions.
As of February 28, 2022, it operated approximately 230 used car stores. CarMax, Inc. was founded in 1993 and is based in Richmond, Virginia.
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 Carmax Inc's historical volatility side-by-side with implied readings across every lookback window, so you can see exactly where KMX HV is running hot, cold, or in line. Make the KMX 30 day historical volatility — and every other window — work for your edge instead of against it.
As of September 24, 2026
As of September 24, 2026
See how volatility has moved over time
Track KMX historical volatility, spot where IV and realized volatility diverge, and find options that are priced in your favor right now.
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