Globalfoundries Surges 8.37% on 508% Volume Spike Climbs to 356th in Dollar Volume Rankings

On September 26, 2025, Globalfoundries (GFS) surged 8.37% with a trading volume of $0.30 billion, marking a 508.32% increase from the previous day. The stock ranked 356th in dollar volume among listed equities, reflecting heightened investor activity amid strategic developments in its semiconductor manufacturing operations.

Recent reports highlight Globalfoundries’ expansion into advanced packaging solutions and its collaboration with a major automotive chip supplier to secure long-term orders. Analysts note that the firm’s focus on 3D-IC integration and cost optimization in its New York and Singapore facilities has bolstered confidence in its ability to capture market share in the AI-driven chip demand cycle. Additionally, management reiterated its commitment to maintaining a 40% gross margin target amid rising input costs, reinforcing its appeal to value investors.

To be sure I run the back-test exactly the way you expect, could you please confirm a few details? 1. Universe: Which market should I scan each day for the “top 500” names – e.g., all U.S. listed stocks (NYSE + NASDAQ + AMEX), only S&P 500 constituents, or another universe? 2. Volume definition: Rank by share volume (shares traded) or by dollar volume (shares × price)? 3. Trade execution convention: Open the position at the same-day close and liquidate at the next-day close (so the holding period is one full trading day)? Any specific transaction-cost or slippage assumption? 4. Weighting within the daily basket: Equal-weighted across the 500 stocks, or value-weighted by, say, market-cap or dollar volume? Once I have these details I can generate the data-retrieval plan and run the back-test.