Mean reversion - Financial definition Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Tags: concept interest curves Concise definition of the term mean reversion The tendency for interest rates to revert back to a mean (average) level. Browse the financial glossary in alpabetical 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