Equifax Plummets 2.56% as Data Security Scrutiny Sends Stock to 438th in U.S. Daily Turnover Rankings

On September 10, 2025, , , . stocks by daily turnover. The drop marked a significant reversal from recent performance, as the credit reporting agency faced renewed scrutiny over data security and regulatory compliance amid broader market volatility.

Analysts noted that the decline aligned with sector-specific pressures, particularly in financial services stocks vulnerable to shifting regulatory expectations. While Equifax has historically demonstrated resilience in high-volume trading environments, its current valuation appears sensitive to macroeconomic signals, including interest rate trajectory uncertainty and investor risk appetite shifts. The stock's performance suggests a reevaluation of long-term growth assumptions by market participants.

Back-test parameters for evaluating Equifax's historical performance require precise definitions: the stock universe must be clarified as either all U.S. listed equities, S&P 500 components, or a custom set. Position sizing methodologies—equal weighting versus volume-proportional allocation—and execution timing (close-to-close vs. open-to-open) will also influence results. These variables remain critical for accurately assessing the stock's behavior from January 3, 2022, to the present.