Timothy L. O'Brien, Columnist

GameStop Taught the Robinhood CEO a Lesson in PR

It took him way too long to explain why he didn’t put his customers first.

Learning things on the job.

Photographer: Alex Flynn/Bloomberg

Sending ill-prepared or untested chief executives into the media wilderness can be disastrous — and sometimes comical.

A case in point is Vlad Tenev, the CEO and cofounder of Robinhood Financial LLC, the little company that has a trading app beloved by the small-fry investors who took down hedge fund giants in the GameStop saga.