The full commission decided to review the SEC staff's approval of the risky investments.
SEC Commissioner Mike Piwowar said "simple agreement for future equity" instruments pose risks.
Wall Street attorney Jay Clayton was officially sworn in.
The analysts stand to get at least $2.5 million for tipping the SEC off to a company's accounting scam.
Bharat R. Ramamurti is senior counsel to Warren on banking and economic policy.
The delay of the rule, which was slated to take effect April 10, was ordered by President Donald Trump.
Brokers have long complained that fees the exchanges charge are too high.
Attorney Jay Clayton, however, is expected to win confirmation easily despite his ties to Wall Street firms.
The SEC is expected to take action today to update its antiquated rules.
The Business Roundtable wants the SEC to reign in shareholder proposals.