这里为啥不是除以1.1

问题如下：

Gabrielle, a trader, is about to set up a regression hedge.She would sell $500,000 of a Treasury bond and purchase TIPS as a hedge. According to historical figures, the DV01on the T-bond is 0.085, the DV01on the TIPS is 0.063, and the regression beta coefficient (hedge adjustment factor) is 1.1. How much TIPS should Gabrielle purchase?

选项：

A.336898 B.407647 C.613276 D.742063

解释：

Defining F^R and F^N as the face amounts of the real and nominal bonds, respectively, and their corresponding DV01s as DV01^R and DV01^N, a DV01 hedge is adjusted by the hedge adjustment factor, or beta, as follow: