杨同学2022-06-10 11:45:44
原版书,18.7bps,莫名的缩小了100倍。解题过程里没有乘以ytm。我认为note(后者)对的,但与原版书例20以及课后第21题不符。请教老师该怎么处理?
回答(1)
Nicholas2022-06-13 09:47:52
同学,早上好。
同学的理解是正确的,这里勘误了。
First, we solve for the expected change in YTM based on a 99% confidence interval for the
bond and a 1.75% yield volatility over 21 trading days, which equals 65.9 bps = (6.174 bps ×
2.33 standard deviations × 21).We can quantify the bond’s market value change using either a
duration approximation or the actual price change as follows. We can use the Excel
MDURATION function to solve for the bond’s duration as 12.025. We can therefore
approximate the change in bond value using the familiar (−ModDur × ΔYield) expression as
$3,605,636 = ($50 million × 0.91 × (−12.025 × .00659)). We can also use the Excel PRICE
function to directly calculate the new price of 88.982 and multiply the price change of 2.018 by
the face value to get $1,009,000.
6.174bps=1.75%*3.528%,其他的是相同的。
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