Johnson Tumbles to 112th in Daily Trading Volume Amid R&D Cuts and European Revenue Slump

Johnson (TICKER) closed at $X.XX on Sept. 15, 2025, , , . The biotech firm's shares traded in a narrow range amid subdued investor activity, reflecting broader market caution in the healthcare sector.

, . Analysts noted the move could impact long-term growth projections, . , signaling confidence in the firm's core diagnostics business despite ongoing patent litigation risks.

, driven by pricing pressures in the EU's centralized procurement system. The company announced a strategic partnership with a German medical device firm to co-develop wearable monitoring systems, though no immediate revenue synergies are expected before 2027. , partially offsetting higher raw material costs.

To run this analysis rigorously I first need to pin down a few implementation details: 1. Universe: Should we rank "all U-S listed common stocks" each day, or a specific index membership (e.g., Russell 3000, S&P 1500, etc.)? 2. Portfolio construction: Equal-weight the 500 names each day (typical), or weight by market-cap / volume? 3. Trading prices & costs: Enter at that day’s close and exit at next day’s close? Any slippage / commission assumptions you’d like baked in? 4. Practical limits: Daily rotation of 500 names triggers very large turnover; are you comfortable proceeding without liquidity or cost constraints beyond the above? Once those points are confirmed I can generate the precise data-retrieval plan, pull the daily volume ranks, create the one-day-hold signals, and feed them into the back-test engine.