Suppose that a bond pays a cash flow Ci at time Ti for i 1,..., N. Then the net present value (NPV) of cash flow Ci is Ci exp (-T yT) NPV Define the weights NPVi and define the duration of the bond to be DUR, wiTi, i-1 which is the weighted average of the times of the cash flows. Show that do 0-0 i-1 i-1 and use this result to Veri Suppose that a bond pays a cash flow Ci at time Ti for i 1,..., N. Then the net present value (NPV) of cash flow Ci is Ci exp (-T yT) NPV Define the weights NPVi and define the duration of the bond to be DUR, wiTi, i-1 which is the weighted average of the times of the cash flows. Show that do 0-0 i-1 i-1 and use this result to Veri