LYB Climbs 0.13% but Ranks 375th in Volume as Cost Pressures and Production Hurdles Weigh

On September 16, 2025, , , . The session saw mixed investor sentiment as market participants digested recent developments in the chemical sector.

Recent industry dynamics highlighted potential cost pressures for the petrochemical giant. , driven by seasonal demand and supply constraints in key refining hubs, . .

Operational updates from LYB's refining segment underscored near-term challenges. Maintenance outages at two key U.S. . While the company has historically managed similar disruptions through inventory buffers, , .

Strategic positioning remains a focal point for investors. . , .

To run this back-test rigorously I need to pin down a few practical details: 1. Universe • Which exchange(s) should the daily-volume ranking cover – all U.S. listed common stocks (NYSE + NASDAQ), only the S&P 500 constituents, or another universe? • Should ETFs, ADRs, penny stocks (< $1), etc. be excluded? 2. Weighting & rebalancing costs • Equal-weight each of the 500 names, or weight by volume or market-cap? • Do we ignore transaction costs and slippage, or assume a fee (e.g., 2 bp per trade)? 3. Price used for entry/exit • Use the next day’s open price after the ranking is formed (most common), or the same day’s close? 4. Benchmark (optional) • Would you like the results compared to a benchmark index such as the S&P 500? Let me know your preferences (or feel free to accept my default suggestions: U.S. common stocks, exclude penny stocks & ETFs, equal-weight, enter next-day open, ignore costs). Once I have these, I’ll generate the data-retrieval plan and run the back-test.