Cardinal Health Trading Volume Surges 49.63 to 383rd Market Rank Amid Regulatory Scrutiny and Strategic Partnership Moves

On September 10, 2025, , . This placed the stock at rank 383 in terms of trading activity across the market, .

Recent developments highlight a mixed market sentiment. A strategic partnership with a major pharmacy benefits manager was confirmed, signaling potential operational efficiencies. However, regulatory scrutiny over drug pricing practices intensified, with two congressional committees requesting detailed documentation. Analysts noted these contrasting factors could pressure short-term volatility despite long-term strategic gains.

Market participants observed heightened short-term interest in CAH, with trading volume surging to a near-month high. This surge coincided with a broader industry trend of increased liquidity in healthcare stocks following a policy update from the Centers for Medicare & Medicaid Services. The spike in volume suggests a balance between institutional buying and profit-taking activity.

To run this back-test rigorously I need to fix a few implementation details that are not fully specified in your request: 1. Stock universe • All U.S.–listed common stocks (ex-ETFs / ADRs / preferreds) – is this acceptable? 2. Trade timing & pricing • Buy at today’s close, sell at next day’s close (i.e., close-to-close return) – correct? • Equal-weight across the 500 names each day, no transaction-cost or slippage assumption – OK? 3. Ranking metric • Daily shares-traded volume (not dollar volume) – is that the ranking you want? If the above match your intent, let me know and I’ll pull the data and run the back-test. (Feel free to adjust any of the points before I proceed.)