Equifax Inc (EFX) Historical Volatility

Tracking EFX historical volatility helps you see how much Equifax Inc's stock price has actually moved, giving you a baseline for whether option premiums look fair, cheap, or expensive. While implied volatility shows what the market expects, EFX's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor EFX 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 a stock's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. EFX's 30 day historical volatility, or EFX HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing EFX's HV to its implied volatility reveals the volatility risk premium. When IV sits well above HV, options are pricing in more movement than the stock has actually delivered, giving option sellers an edge. When HV runs hot relative to IV, options are pricing in less movement than the stock has delivered, and buyers may be underpaying for it.

Equifax Inc. provides information solutions and human resources business process automation outsourcing services for businesses, governments, and consumers. The company operates through three segments: Workforce Solutions, U.S. Information Solutions (USIS), and International. The Workforce Solutions segment offers employment, income, criminal history, and social security number verification services, as well as payroll-based transaction, employment tax management, and identity theft protection products. The USIS segment provides consumer and commercial information services, such as credit information and credit scoring, credit modeling and portfolio analytics, locate, fraud detection and prevention, identity verification, and other consulting; mortgage services; financial marketing services; identity management services; credit monitoring products; and online information, decisioning technology solutions, as well as portfolio management, mortgage reporting, and consumer credit information services.