17 Assume that you has an obligation to pay $1000 at the end of this year and to pay $1500 at the end of the next year. Today's pure yield curve is flat at 5%. To shield this obligation from unexpected changes in interest rates, you should Your choice: 17/25 Qs Buy zero-coupon bonds with maturity of about 1.65 years Buy zero-coupon bonds with maturity of about 1.59 years Buy coupon bonds with maturity of about 1.50 years Buy zero-coupon bonds with maturity of about 1.70 years