Earlier quoted context omitted.
My issue with this line of thought, is that while completely true, it also doesn't mean a whole lot. It is completely dependent on it being the US stock market. And during a period for that stock market that had a number of incredibly important items go it's way. Its not backfitting because it happened, but we only find it meaningful because we happened to have been here during it. For any number of reasons, includin…
> "It is completely dependent on it being the US stock market." Not really. It's only dependent on stock prices inherently reflecting all of the information buyers and sellers have about their expectations, including expected risk and reward. Trying to "time" the market basically means trying to find a signal other buyers and sellers haven't figured out, or at least not enough of them to cause prices to shift accordi…
Maybe I define market timing differently. Holding a healthy cash position for future investment and selling investments from time to time based on either their valuation or prospects, whatever that is called, is not a bad idea.
I contrast that with being 100% invested in index funds at all times, forever. That might backtest well, but that doesn't mean it will forward test at all well.