Shopify's 53.5% Volume Spike Pushes It Into Top 100 U.S. Traded Equities

On September 18, 2025, , . , securing a position within the top 100 most actively traded equities in the U.S. market.

Recent developments highlighted in market coverage focus on shifts toward high-volume equities. Analysts noted that elevated trading activity often correlates with short-term volatility, particularly in companies with significant retail investor participation. The surge in volume suggests heightened interest from traders capitalizing on , though no direct corporate announcements were cited as catalysts.

To construct a robust for a strategy involving the top 500 stocks by daily trading volume held for one day, several parameters must be clarified: universe definition, pricing conventions, position sizing, and friction considerations. For instance, determining whether to include all listed U.S. stocks or restrict to a specific index, selecting (close-to-close or open-to-close), and deciding on weighting methods (equal-weight vs. market-cap/volume) are critical. and slippage modeling further influence the accuracy of such a back-test.