Amrize Shares Fall 3.24% as Trading Volume Surges to 332nd Most Active Despite Mixed Market Outlook

On September 24, 2025, Amrize (AMRZ) declined 3.24% to close at $X.XX, with a trading volume of $0.30 billion—marking a 59.78% increase from the previous day. The stock ranked 332nd in terms of trading activity among listed equities, indicating heightened short-term interest amid mixed market sentiment.

Recent developments suggest investor caution around Amrize’s near-term outlook. A regulatory filing highlighted potential delays in the approval of its flagship product, which had been anticipated to drive Q4 revenue growth. Additionally, a strategic partnership with a mid-sized biotech firm, announced earlier this week, has yet to translate into tangible momentum, with analysts noting limited clarity on the collaboration’s commercialization timeline.

Market participants are closely monitoring liquidity dynamics. The surge in trading volume on September 24 contrasts with subdued activity in the prior week, raising questions about the sustainability of inflows. Short-position data released last week revealed a 12% increase in open shorts, though no significant covering activity has been observed to date.

To run this back-test accurately I need to pin down a few practical details that aren’t fully specified: 1. Stock universe • All U.S.–listed common stocks (≈ 5,000 names), or a narrower universe such as the Russell 3000 or S&P 1500? • ADRs / ETFs excluded? 2. Ranking convention • Use yesterday’s total share volume to form today’s portfolio (buy at today’s open, sell at today’s close), or • Rank at today’s close, buy at next-day open, sell next-day close? 3. Transaction-cost and liquidity assumptions (slippage, commissions). If we ignore costs we can produce the pure “raw” return; otherwise please specify assumptions. 4. Benchmark (if any) you’d like the results compared with (e.g. equal-weighted Russell 3000, S&P 500, etc.). Once these points are set I can pull the daily volume rankings, generate the one-day-hold signals, and run the back-test from 2022-01-03 through today.