到底是看绝对值还是要看正负号？我记得老师讲过贡献度只看绝对值的大小。
但是passive equity investing书后题Q13“ Using a sector attribution analysis based on Exhibit 1, which US large-cap sector is the primary contributor to the portfolio’s underperformance relative to the benchmark?” 答案选了information technology。如果不考虑正负 应该选consumer啊
