Self-Directed Retirement Accounts
Millions of Americans manage IRAs, Roth IRAs, and rollover 401(k) accounts through discount brokers like Fidelity, Schwab, TD Ameritrade, and Robinhood. When these investors buy or sell stocks, their orders are routed to wholesale market makers including Citadel Securities through PFOF arrangements. The execution quality they receive directly affects their investment returns.
The Compounding Effect of Small Differences
The difference between best-available execution and PFOF-influenced execution on any single trade is small — potentially fractions of a cent per share. But over a career of investing — hundreds or thousands of trades over decades — small execution quality differences compound. Academic estimates suggest aggregate retail investor costs from suboptimal execution are in the billions of dollars annually, distributed across millions of individual accounts.
Comparing Broker Execution Quality
Some brokers publish detailed execution quality statistics. FINRA's Rule 605 and 606 data allow comparison of execution quality across market makers. Investors who want to optimize their retirement account trading can review this data to make more informed broker choices. The SEC's website also provides investor guidance on evaluating broker execution quality.
What Retirees and Near-Retirees Should Know
For investors near retirement or already retired, the volume of trades may be lower, but each trade may represent a larger portion of assets. Retirees who actively manage their portfolios should be especially attentive to execution quality. For passive investors who rarely trade index funds, PFOF impacts are less significant. The most affected are active traders in self-directed accounts.