The Structural Conflict
A broker's fiduciary and regulatory duty requires it to seek the best reasonably available price for client orders. PFOF payments create the opposite incentive: route to whoever pays the most, not whoever executes best. These goals are not always aligned. A market maker that pays more for order flow and provides worse execution is more profitable for the broker. The client bears the cost of inferior execution.
The Disclosure 'Solution' and Its Limits
U.S. regulators have addressed this conflict primarily through disclosure: SEC Rule 606 requires brokers to disclose where they route orders and what PFOF they receive. Critics argue that disclosure is insufficient because most retail investors do not read or understand Rule 606 disclosures, do not have the tools to analyze execution quality, and cannot practically change brokers without cost. In The Ethics Reporter's view, disclosure is a floor, not a ceiling, of investor protection.
The SEC's Attempted Reforms
Under Chair Gary Gensler, the SEC proposed rules in 2022 that would have mandated order competition auctions — requiring retail orders to be exposed to competing market makers before routing to a PFOF recipient. The proposal was controversial. In 2024, the SEC under subsequent leadership withdrew or scaled back key elements of the market structure reform package, according to public reporting.
International Comparison
The United Kingdom's Financial Conduct Authority effectively banned PFOF for retail clients. The European Union's MiFID II framework substantially restricts it. Canada prohibits it. In each case, regulators concluded that the conflict of interest was too fundamental to be adequately managed by disclosure alone. The U.S. is an outlier among developed financial markets in permitting the practice in its current form.