The drama surrounding GameStop Corp. and other high-flying stocks targeted by social media-influenced traders has triggered a debate about behavior in markets and what regulators should do about it.

Larry Tabb, the head of market-structure research at Bloomberg Intelligence, discusses this issue as well as the role clearing firms played in causing Robinhood and other brokerages to restrict trading in certain stocks.

Mentioned in this podcast:

In 11 Hours of Pure Mania, 100% Stock Gains Popped Up Everywhere

How a Penny Stock Explodes From Obscurity to 451% Gains Via Chat Forums

Reddit Jolts Activist-Short Hedge Funds Into ‘Adapt or Die’ Mode

WallStreetBets Briefly Goes Dark After Fueling GameStop’s Surge

Battle Between Hedge Funds and Day Traders Creates Record Volume