The Winners That Stayed and the Losers That Vanished: The Hidden Survivorship Bias in Mutual Fund Returns
At a cousin's engagement dinner last month, Arjun could not stop talking about his mutual fund. He pulled out his phone, showed the screen to anyone who would look, and said the same line three times over the course of the evening: fifteen years, and it has compounded at nearly 18 percent. Everyone nodded, impressed. Nobody in that room, including Arjun, stopped to ask a more uncomfortable question. Out of every fund that existed in that same category fifteen years ago, how many are still around today to even be compared against. The answer, as it turns out, is a much smaller number than most people assume, and the funds that vanished did not vanish because nothing happened to them. They vanished because they lost, badly, and were then folded quietly into better performing siblings, taking their entire embarrassing history down with them. Most investors assume that a long track record, by itself, represents a fair picture of how that fund's category has generally performed. ...