In discussing the portfolio’s performance with a colleague, the following statements are made:
Statement 1The excess return of the portfolio is almost entirely driven by the selection and interaction performance of the financial services sector.
Statement 2The decision to underweight the health care sector was not beneficial.
Statement 3The decision to underweight the consumer goods sector was beneficial given the net contribution of 0.41% to the excess return.
请教一下老师，这道题怎么理解，为什么2是对的，1，3都是错的？
