Flutter’s 10.33% Plunge Sends Trading Volume Surging 282% to $1.7B Ranking 54th in Market Volume Amid Strategic Monetization Shift

On September 30, 2025, Flutter (FLUT) closed with a 10.33% decline, trading at a volume of $1.70 billion—a 282.43% increase from the previous day—ranking 54th in market volume. The stock's sharp drop followed a strategic shift in its platform's monetization model, which has raised concerns among investors about short-term revenue visibility.

Analysts noted that Flutter's revised advertising framework, prioritizing user experience over immediate ad revenue, has triggered volatility. While the company emphasized long-term user retention benefits, market participants remain cautious about the near-term impact on quarterly earnings. This strategic pivot contrasts with previous growth strategies, creating uncertainty for earnings forecasts.

Portfolio managers highlighted the stock's heightened sensitivity to algorithmic trading patterns. The surge in trading volume suggests increased short-term positioning by algorithmic traders reacting to the strategic announcement. However, the absence of broader market catalysts limits potential for a reversal in the near term.

To run this back-test accurately I need to clarify two practical points: 1. Universe – Which market should be scanned each day for the “top-500 by trading volume”? • U.S. listed common shares (≈7 000 names), • a narrower index such as the Russell 3000, or • another market you have in mind? 2. Portfolio construction – Do you want the results for: • an equal-weighted portfolio of the 500 names re-balanced daily (i.e., one-day holding period), or • the average of the 500 individual stock returns (no portfolio-level compounding or transaction costs)? Once I have those details I can generate the daily buy/sell signals and run the back-test from 2022-01-03 through today.