Centene's Volume Dives 55% to 173rd in U.S. Rankings as Shares Slide 2.4%

On September 12, 2025, , . The stock ranked 173rd in trading volume among U.S. .

Analysts noted that the drop in trading volume could reflect reduced short-term speculative activity, though the decline outperformed broader market trends. No company-specific announcements or regulatory updates were reported to directly influence the stock’s performance. The move followed a period of consolidation in health insurance sector valuations, with Centene’s shares remaining sensitive to macroeconomic sentiment shifts.

To run this back-test accurately, I need to pin down a few practical details that aren’t yet specified: 1. Universe • Do we look at all U.S. common stocks, a specific index set (e.g., Russell 3000, S&P 1500), or another market/universe? 2. Ranking day vs. execution day • Because today’s full-day volume is only known after the close, the standard approach is: – Rank stocks by the previous trading day’s volume. – Enter positions at the next day’s open, exit at that day’s close (1-day holding period). • Is that acceptable, or would you prefer a different convention? 3. Transaction assumptions • Equal-weight positions? • No transaction costs / slippage, or should we embed simple cost assumptions? Once we lock down those items I can lay out the data retrieval plan and run the back-test.