Share your insights or perspective on the financial matter presented in the input.

Dalbar: How can the average investor lose money?
I think you are mixing two different concepts here. The average investor, in the quoted reference, means an average single investor like you or like me. the average investor consistently under-performs the market. However, you then ask the question and you seem to refer to all investors as a group; individuals, institutions, investment banks, et al. since together, investors own 100% of the stock in every company? Every investor could match the performance of the market easily and at low fees by simply buying an S&P index fund and holding it. In fact, some investors can even beat the market with the addition of some stocks. Here is the ten-year chart of Berkshire-Hathaway B compared to the S&P 500.   There are other examples. However, few of us have the discipline to do so. We read questions here every week about the coming turbulence in the market, about the next big trend, about the next bubble, etc. The average investor thinks he is smarter than the market and buys on a whim or sells likewise and misses out on the long, slow overall growth in the markets. Finally, the title of your question is “Dalbar: How can the average investor lose money?” I doubt that the average investor loses money in the past several years. Not making as much money as is easily possible is not at all the same as losing money.