SEC closes in on rules that could reshape how U.S. stock market operates By: MarketWatch June 07, 2022 at 09:05 AM EDT The U.S. Securities and Exchange Commission is preparing to propose major changes to the stock market’s plumbing as soon as this fall. Read More >> Related Stocks: Charles Schwab Nasdaq OMX Group Robinhood Markets Inc Cl A Virtu Financial Cm A