单选题 An international bond investor has gathered the following information on a 10 - year, annualpay U. S. corporate bond: Currently trading at par value Annual coupon of 10% Estimated price if rates increase 50 basis points is 96.99% Estimated price is rates decrease 50 basis points is 103.14% The bond's duration is closest to:

A、

A. 6.58.
B、

B. 0.62.
C、

C. 6.15.

【正确答案】 C

【答案解析】
Duration = (V^--V⁺)/[2V₀ (change in required yield)].
Thus, duration = (103.14-96.99)/(2×100×0.005)=6.15. Remember that the change in interest rates must be in decimal form.