Like many teenage boys, Denis Dariotis didn’t want his teacher to see what was on his computer. So when the teacher asked to sneak a peek, Dariotis said no.

“No, sorry, it’s private. I can’t show you,” Dariotis remembers saying.

This was not the first time he’d faced off with his teachers. Having first dipped his toes into stock trading at age nine with the help of his father, a portfolio manager, Dariotis had found himself not just managing his own assets but those of a sprawling group of investors.

“It caused a lot of problems,” Dariotis told DL News.

For instance, he couldn’t show his computer…