It is an accepted belief that retail investors, swayed by a barrage of financial news and information, and the wiring in their own brains, tend to systematically buy at market peaks and sell at market lows, resulting in returns that are far lower than what could have been achieved by simply buying and holding.
This so-called "behavior gap" has been quantified most famously over the years by DALBAR, which produces and annually updates a study of the difference between investor (dollar-weighted) returns and index (time-weighted) returns, and currently shows that investors have cost themselves more than 4% per year in returns for the past two decades.
Yet the reality is that DALBAR's methodology confounds the impact of investor behavior, and the simple consequences of return sequences; it's entirely possible that some or all of the low DALBAR investor returns are simply due to the fact that markets rose for the first half of their time sample (the 1990s) and were flat for the second half (the 2000s).
And in fact, that appears to be the case. Once DALBAR updated their projections to compare investor returns to a passive investor who simply invested systematically over the entire time period, the result surprisingly shows that retail investors in the aggregated actually outperformed systematic dollar cost averaging for the past 20 years!Read More...