Rho - Financial definition Tags: options valuation and pricing Concise definition of the term rho Measures the sensitivity of an option's price to a variation in the risk-free interest rate. Additional information related to this definition Definitions of related terms Delta • Gamma • Option • Theta • Vega Formulas related to this definition Rho of a call option • Rho of a put option Browse the financial glossary in alphabetical order # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z