Treasury securities
Fixed IncomeDefinition
US government debt in three flavors: T-bills (< 1 year, no coupon), T-notes (2-10 years, semi-annual coupon), T-bonds (20-30 years, semi-annual coupon). Considered risk-free.
Example
A 10-year Treasury note paying 4.3% = the benchmark "risk-free" rate for all other investments.