Mattel Inc. must face a would-be class suit alleging it engaged in a “cover-up” of material misstatements from its 2017 financial results, after a federal judge in California declined to throw out the case.

The U.S. Securities and Exchange Commission said it is “actively monitoring” volatility in options and equities markets amid a surge in GameStop Corp. and other companies over the past week that prompted Democratic Senator Elizabeth Warren to demand action from regulators.

Wells Fargo & Co. banned its advisers from making stock recommendations on GameStop Corp. and AMC Entertainment Holdings Inc., whose shares have surged on a push from online retail traders.

Bitcoin is inherently risky and only central banks should issue digital currencies, according to the Bank for International Settlements.

Vuuzle Media Corp. misappropriated about $12 million of investors’ money by falsely representing that it was a legitimate, successful, and growing provider of online live streaming and entertainment services, the Securities and Exchange Commission charges in a lawsuit filed Wednesday in federal court in New Jersey.

Wednesday’s retail trading crush sent online brokerages reeling, with several sites reporting disruptions and glitches and one even limiting trades of hot stocks.