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Can one unearth above-average fund managers, who can consistently or over time beat the market? Once again, the academic research is gloomy for the investment industry. Using the database first started by Jim Lorie’s Center for Research in Security Prices, S&P Dow Jones Indices publishes a semiannual “persistence scorecard” on how often top-performing fund managers keep excelling. The results are grim reading, with less than 3 percent of top-performing equity funds remaining in the top after five years. In fact, being a top performer is more likely to presage a slump than a sustained run.18 As a result, as Fernando’s defenestration highlighted, the hurdle to retain the faith of investors keeps getting higher, even for fund managers who do well.* In the 1990s, the top six deciles of US equities-focused mutual funds enjoyed investor inflows, according to Morgan Stanley.19 In the first decade of the new millennium, only the top three deciles did so, and in the 2010–20 period, only the top 10 percent of funds have managed to avoid outflows, and gathered assets at a far slower pace than they would have in the past.
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Robin Wigglesworth (Trillions: How a Band of Wall Street Renegades Invented the Index Fund and Changed Finance Forever)