00:01
First, to calculate our yield to maturity, we can use our formula where we take our price and that is going to equal our face value divided by 1 plus our ytm to the nth power.
00:17
Here, we're going to get 69 .20205 is equal to 100 divided by y plus ytm to the 100th power.
00:33
Now, we can solve this for ytm and we're going to get approximately 0 .03877 which is equal to 3 .877%.
00:48
The modified duration is going to be equal to its time to maturity which is 10 years.
00:57
Then for b, we want to calculate the approximate bond prior to the change.
01:04
For a 50 point increase in yield, we can calculate this by taking our change in price and that is going to be equivalent to negative d times our change in ytm times our price.
01:29
Then if we plug in our values, we're going to get negative 10 times 0 .005 times 69 .20205 and we're going to get negative 3 ,400...3 ,004 ,601.
01:49
Now, our approximate new bond price is going to be 69 .20205 minus this 34 ,601 which is going to be 65 ,741 .95.
02:17
Now to calculate our exact new bond price based on our new yield to maturity, we can use the formula where our new price is going to equal our face value divided by 1 plus our ytm to the nth power...