Answer:
(B) Leave his portfolio the way it is now
Step-by-step explanation:
Bond value and market interest rates are inversely related. When the market interest rates are expected to decline and an investor already holds a bond with fixed rate of interest, the value of such bonds shall rise.
Market interest rates refer to the rate of interest other firms are offering on similarly priced bonds. Thus market interest rate also implies investor expectations i.e YTM (yield to maturity) which is used as a discounting factor to ascertain the price of a bond.
Lesser the discounting rate (yield to maturity), higher shall be the value of a bond.
Thus, it is recommended for Mr Smith to (B) leave his portfolio the way it is now.