Please answer all

Macaulay duration of the bond portfolio is 10 and the modified duration is 5. a. How this difference can be explained? b. If we add to the portfolio a bond mature d in 15 ye ars, how will its Macaulay duration and the modified duration change? If the forwards points USD/ILS are negative: a. What can you say about two parameters that are "responsible" for the negative sign? b. Who enjoys from the negative sign - Israili importes or exporters from/to the US? Macaulay duration of the bond portfolio is 10 and the modified duration is 5. a. How this difference can be explained? b. If we add to the portfolio a bond mature d in 15 ye ars, how will its Macaulay duration and the modified duration change? If the forwards points USD/ILS are negative: a. What can you say about two parameters that are "responsible" for the negative sign? b. Who enjoys from the negative sign - Israili importes or exporters from/to the US