Arch Global Surges 2.6% on Strategic Cloud Shift, Trading Volume Ranks 429th in U.S. Stocks

Arch Global (ACGL) surged 2.60% on Sept. 24, 2025, with a trading volume of $230 million, ranking 429th among U.S. stocks. The move followed a strategic shift in its cloud infrastructure division, which announced expanded partnerships with regional data centers to optimize costs. Analysts noted the update could enhance operational efficiency amid rising demand for hybrid cloud solutions in emerging markets.

Recent regulatory filings revealed the company’s 2025 R&D budget allocation now prioritizes AI-driven cybersecurity tools, signaling a pivot toward high-margin technology services. This strategic realignment aligns with broader industry trends, as firms increasingly integrate AI to address evolving cyber threats. Market participants interpreted the shift as a positive catalyst for long-term earnings potential.

To run this properly I need to clear up two practical points before pulling data and launching the back-test: 1. Market universe – Which exchange(s) should be scanned each day to find the “top 500 by dollar trading volume”? • U.S. listed stocks (NYSE + NASDAQ)? • Another specific market? 2. Trade/exit rule – Please confirm the mechanics: • At each market close we rank stocks by that day’s dollar volume, buy the top 500 in equal-weight, and liquidate them all at the next day’s close (i.e., a 1-day holding period). Is that correct? Once I have those two pieces I can generate the retrieval plan and run the back-test.