The SEC will host a Sept. 17 roundtable on 24-hour trading with Blackrock, Citadel and NYSE, as crypto's nonstop markets push Wall Street to catch up.

Robinhood, BlackRock, Nasdaq and other firms will join an SEC roundtable on the operational shift toward 24-hour stock trading.

The U.S. Securities and Exchange Commission issued an agenda for its 24-trading roundtable and proposed a new transfer-agent rule with blockchain implications.