Answer:
11 years
Step-by-step explanation:
The Macauly duration of a bond is generally calculated for coupon bearing bonds sold either at par or at premium or discount values. When we are asked about the Macauly duration of a zero coupon bond, the answer is simply the time to maturity of the bond, or the bond duration. In this case, the time to maturity is 11 years which equals the Macauly duration.