为什么earning结论错了

问题如下：

James,an analyst of PE make the following statement:

The use of p/e multiples and other multiples for analysis is ineffective, because the p/e ratio is based on the historical data, and not all companies have a positive accounting earning.

James 's statement is most likely:

选项：

A.

inaccurate regarding to both earnings and historical data.

B.

inaccurate with respect to historical data and accurate with respect to earnings.

C.

accurate with respect to historical data and inaccurate with respect to earnings.

解释：

A is correct.

This statement is inaccurate on both prospectives. Although you can calculate multiples base on historical data, you can also calculate the multiples base on the forcasted values. For companies that don't have an accounting income, you can use several other multiples. These multiples are usually specific to a company's industry, including price to sales and price to cash flow.

考试：Price Multiple Approach

第一，对于乘数来说，我们在计算的时候可以使用历史数据也可以使用未来的预测数据。以PE为例，用历史盈利数据我们得到的是trailing PE,而基于预测数据，我们可以获得leading PE.第一结论说乘数只能基于历史数据，说法错误。

第二，乘数法不能用，因为一些公司盈利可能为负。我们说盈利为负我们就不要使用PE，但还有很多其他乘数可以用，比如PB,PS。