Despite passive investing’s incredible recent growth, there are several reasons we’re not concerned with indexing becoming too popular.

Given multiple changes to federal estate tax laws over the past decade, many high-net worth individuals are suffering from estate planning fatigue. Despite the uncertain tax environment, however, estate planning still matters. Here’s why.

It’s been 25 years since Professors Eugene Fama and Ken French explained why investors were likely, but not guaranteed, to earn better returns by favoring small cap and value stocks. Results since then have validated the researchers’ conclusions, but capturing those higher returns hasn’t always been easy.

Uncertainty is a constant in investing. Rather than hope for portfolio gymnastics to deal with unforeseen events, sensible investors rely on diversification and discipline. In so doing, they distinguish themselves from speculators and, we’d argue, not only enjoy a higher probability of success but a better quality of life, as well.

Market-timing investors’ efforts to outguess the random day-to-day variations in the stock market hurts their performance. They’d have better results if they behaved like rats.