Wall Street Stock Trading Set for Overhaul in New SEC Plan

US regulators will take the first step Wednesday toward the most widespread revamp in more than a decade of the way stocks are traded, a move that the agency says will spur better prices for investors and direct more business to traditional exchanges.

The Securities and Exchange Commission laid out four proposals that Chair Gary Gensler says would boost transparency and competition. They delve into the guts of how the $43 trillion market works, and affect everything from order routing to pricing and disclosures that brokers must make to clients.

The SEC’s plans, which will be debated by commissioners during an agency meeting, represent a direct response to many of the issues that were spotlighted by last year’s meme-stock-trading craze. Over the past year, the contours of the effort have been a source of significant angst for the industry as Gensler signaled that major overhauls loomed.

On Wednesday, the SEC chief doubled down. “Today’s markets are not as fair and competitive as possible for individual investors — everyday retail investors,” Gensler said in remarks ahead of the meeting. Taken together, the rule changes would be the biggest since 2005.

Broadly, the plans could lead to more stock orders filled on exchanges like Nasdaq and the New York Stock Exchange. Currently, a significant chunk of retail trades are handled by by wholesale brokerages like Virtu Financial Inc. and Citadel Securities, which pay for the right to process customer trades from firms like Charles Schwab Corp. and Robinhood Markets Inc.

Virtu shares fell by as much as 6.3% in New York trading, the biggest intraday decline since Sept. 6, while Robinhood dropped by as much as 4.4% before rebounding.