The following data are given on a U.S. bond portfolio. What is the total expected retuin of this bond portfolio over the next 12 months? Notional principal of portfolio (in millions) $500 Average bond coupon payment (per $100 par value) $3.50 Coupon frequency Annual Current average bond price $98.50 Expected average bond price in one year (assuming an unchanged yield curve) $99.50 Average bond convexity 18 Average bond modified duration 3.25 Expected average yield and yield spread change -0.20% Expected credit losses 0.30%