What is the duration of a zero-coupon bond that has eight years ... - Quora The duration of a zero-coupon bond is by definition equal to its maturity, so an 8-year zero has a duration of 8 years. If the maturity increases to 10 years, then so does the duration. 1 Kyle Taylor Founder at The Penny Hoarder (2010-present) Updated Wed Promoted Should you leave more than $1,000 in a checking account? You've done it.