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On October 10, 2025,
(ALB) closed at a 6.88% decline, marking its lowest price in over three months. With a trading volume of $390 million, the stock ranked 324th in dollar volume among U.S. equities, reflecting a 29.19% drop from the previous day’s activity. The move followed a shift in lithium market dynamics as spot prices for lithium carbonate fell below $13,000 per ton for the first time since mid-2024. Analysts noted that the decline accelerated following reports of unconfirmed production restarts at two major Chinese refining facilities, which could increase regional supply by up to 12% by year-end.Market participants observed that institutional selling pressure intensified during the session, with several large block trades executed below the 52-week average volume threshold. Short-interest data released earlier in the week showed open shorts rising to 3.2% of float, the highest level since February. While the company’s recent earnings report highlighted stable battery-grade lithium margins, investors appeared to prioritize near-term supply-side risks over long-term demand forecasts for EV-grade materials.
Backtesting of a volume-weighted cross-sectional strategy from January 1, 2022, to October 10, 2025, would require daily ranking of 500 U.S. equities by dollar volume, constructing an equal-weighted portfolio, and executing daily turnover. Current tools limit this process to single-ticker analysis or event studies. Key parameters to define include: universe scope (e.g., Russell 3000 vs. full NYSE/NASDAQ), ranking metric (share volume vs. dollar volume), execution timing (close-to-close vs. open-to-close), and transaction cost assumptions. An approximate approach might involve studying an ETF proxy or analyzing the "top-500-by-volume" effect on representative samples.

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