Robinhood and other retail brokerages are cutting off trading for some red-hot stocks. And that’s causing some of them to collapse in a big way.

With some investors starting to cry foul, should we expect a reaction from the broader market? We’ll ask Jonathan Golub of Credit Suisse.

Plus, Republicans in Washington are weighing in on the “Reddit Revolution,” and have a warning for Wall St.: the populist movement is here to stay.

And, Paul Hickey of Bespoke says there’s more to the run-up in names like Gamestop besides amateurs buying stocks blindly. He’ll explain why.