Robinhood Slips to 18th in U.S. Equities Amid Regulatory Scrutiny and Rate Hikes

Robinhood Markets (HOOD) closed at a 2.31% decline on Sept. 12, 2025, with $4.31 billion in trading volume ranking it 18th among U.S. equities. The stock’s performance followed a mixed session where regulatory scrutiny and shifting market dynamics weighed on investor sentiment.

Analysts noted that the decline aligned with broader retail trading platform sector volatility, as investors reevaluated growth trajectories amid macroeconomic uncertainty. While no company-specific earnings or strategic announcements directly impacted the stock during the session, broader market positioning for high-frequency trading platforms remained under pressure from rising interest rate expectations.

To build and run this back-test accurately, clarification is required on four key parameters: (1) the market universe for selecting the “top 500 by daily trading volume,” (2) entry/exit price definitions (e.g., close-to-close vs. open-to-close), (3) transaction cost assumptions (zero costs vs. commission/slippage inclusion), and (4) rebalancing timing (daily re-ranking of the top 500). Once these details are confirmed, the data-retrieval plan and back-test execution can proceed.