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The growth of passive investing has spurred suggestions that stock returns may be influenced by a so-called “index effect,” as trading by index funds responds to changes in index membership. If this were true, stocks added to the index would initially outperform amid buying pressure, while index deletions would underperform. Our recent paper—“What Happened to…
In the 20 years ending in 2020, 94% of all large-cap U.S. managers lagged the S&P 500®. Mid- and small-cap results were almost equally disappointing. A notable consequence of these shortfalls in active performance has been the rise in passive investing, one of the most significant trends in modern financial history. Our recent Annual Survey…
