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Interest Rate Sensitivity

A bond trader purchased each of the following bonds at a yield to maturity of 8%. Immediately after she purchased the bonds, interest rates fell to 7%. What is the percentage change in the price of each bond after the decline in interest rates? Fill in the following table: NOTE: the correct answers are provided under the percantage change colomn However I need all work shown to get the percentage change answer thanks!

	price at 8%	price @7%	percentage change
10 yr 10% annual coupon			6.75
10 yr zero			9.75
5 year zero			4.76
30 year zero			32.19
perpetuity of $100 annual coupon			14.29