A bond has duration of 4.50 and convexity of -39.20. If interest rates increase by 0.5%, the percentage change in the bond's price will be closest to:
A is correct because when convexity is known the percentage change in a bond's price = (-duration × ∆y × 100)+ (C × (∆y)2 × 100) = (-4.50 × 0.005 × 100)+(-39.20 × 0.0052 × 100) = -2.35.