Step 5: Apply these variables in the bond valuation formula. The formula typically involves calculating the present value of the bond's future coupon payments and the present value of its face value at maturity, using the market interest rate as the discount rate. Use the formula: PV = Σ (C / (1 + r)^t) + (FV / (1 + r)^T), where PV is the bond's price, C is the coupon payment, r is the market interest rate, t is the time period, FV is the face value, and T is the time to maturity.