factor 数目

问题如下：

Yusuf states, “We use multifactor models for portfolio construction as well as return and risk attribution.” She asks, “Can anyone tell me how arbitrage pricing theory (APT) is related to these multifactor models?”

Quek responds, “APT helps us determine the appropriate number of factors to use in a multifactor model; however, it does not specify the identity of those factors.”

Is Quek’s response to Yusuf most likely correct?

选项：

A.

Yes.

B.

No, she is incorrect regarding the number of factors.

C.

No, she is incorrect regarding the identity of the factors.

解释：

Quek is incorrect in stating that APT specifies the number of factors in a multifactor model but is correct in stating that APT does not specify the identity of factors in a multifactor model. APT does not indicate the number of factors or their identity.