What is the silliest investing mistake you ever made? Something that could serve as a lesson for others.

I am compiling a list to be shared with college students who will soon start their careers and hopefully start investing.

Here’s Mine: When allocated shares in an IPO, I used to book profits immediately upon listing. I did this because I was scarred by dot.com bubble bust. In hindsight, it was a terribly short-sighted decision because many of those scaled up and became profitable companies.