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Air Products and Chemicals (APD) closed lower by 0.85% on October 8, 2025, with a trading volume of $0.23 billion, ranking 490th in market activity. The decline followed a strategic shift in its industrial gas supply chain, as the company announced a $250 million investment in modular production units to accelerate project delivery timelines. This move, while signaling long-term efficiency gains, raised concerns about short-term capital allocation priorities among investors.
Analysts noted the stock's performance was also influenced by evolving demand dynamics in the semiconductor sector, where Air's hydrogen and specialty gas contracts face pricing pressures from emerging suppliers in Southeast Asia. The company's Q3 earnings guidance, released earlier in the week, maintained revenue projections despite these challenges, citing offsetting gains in its LNG storage solutions business.
To build and back-test this “Top-500-by-volume, 1-day-hold” strategy we first need a few clarifications, because the implementation details will materially affect the results: 1. Market universe • U.S. listed stocks (NYSE + NASDAQ + AMEX)? • Another specific market (e.g., Shanghai, London, etc.)? 2. Rebalancing/weighting method • Equal-weighted (each of the 500 stocks gets the same dollar weight)? • Volume-weighted (heavier weight to the most actively traded names)? 3. Practical constraints • Treatment of stocks that don’t have price data the next day (suspensions, delistings, etc.). • Slippage/transaction-cost assumptions (if any). Once these points are nailed down, I can pull the relevant daily volume data, generate the trade list for every session from 2022-01-01 to today, and run the back-test. Please let me know your preferences on the above items so I can proceed.

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