Risk-free interest rate - Financial definition
Concise definition of the term risk-free interest rate
The risk-free interest rate for a given maturity is the theoretical return on an investment which is characterized by a complete absence of any risk of financial loss, meaning that there is no uncertainty about future cash flows on interest or repayments.
Comprehensive definition of the term risk-free interest rate
As completely risk-free assets do not exist, Government bonds such as US Treasuries are frequently used as a proxy.