提问：CFA3级公式密匙Core-CME page3权益估值经典题目，请问stock A/B/C的一年预期收益怎么计算出来的
Stock A: D/P=2%, -%change in S=-1%, %change in P/E=10%, %change in E=3%
Stock B: D/P=3%, -%change in S=3%, %change in P/E=7.5%, %change in E=1%
Stock C: D/P=2.5%, -%change in S=2%, %change in P/E=2%, %change in E=2%
公式：E(Re)=(D/P-%change in S) + %change in E + % change in P/E
