Passive funds tracking an index lose out when its make-up changes

Passive funds tracking an index lose out when its make-up changesMaybe there is hope for active fund managers after all IS THERE hope for fund managers after all? Conventional “active” managers, who try to pick stocks that will beat the market, have been losing ground to “passive” funds, which simply own all assets in a given sector in proportion to their market value. The main advantage of the la