This week, Robin Powell, a UK-based investor advocate, writes in his The Evidence-Based Investor blog:
“If global stock markets have taught us anything this year, surely it’s that successfully timing the market is impossible. And I don’t use that word lightly. Of course, there will always be people who get it right once. But consistently making the right calls over the long term can’t be done. There’s not a single person or trading system in the world that can do that.
“Of course, there are many, many people out there who claim to be able to do it — not least active fund managers. But, as Professor David Blake from City University in London reminded us again today, the overwhelming weight of academic evidence shows that active managers are “very poor at market timing” — and cites their dismal performance during the Covid-19 pandemic as yet another example of it, “Most outperformance is due to luck, not skill,” Blake told Financial News. “It takes a very long period of performance data to distinguish skilled managers from lucky ones.”
“Many financial advisers are also market timers. Some of them urged their clients to sell their stocks when markets fell in March. Did they get those clients back into the market in time for the start of the rebound? I very much doubt any of them did.”
In a series of new videos for Dimensional Fund Advisors, Professor Kenneth French explains the key principles of a successful investing experience. Here, he warns that “most people who try to time the market are just fooling themselves”: