IDXX Surges 2.29% on $290M Volume Ranks 360th in U.S. Trading Activity as Strategic Shift to Digital Diagnostics Gains Momentum

On September 18, 2025, , , which ranked it 360th in terms of trading activity among U.S. stocks. The move followed a strategic focus on veterinary diagnostics and companion animal health, with recent product launches in digital health solutions for veterinary practices. Analysts noted that the company’s Q3 guidance for recurring revenue growth outperformed sector averages, reinforcing confidence in its long-term market positioning.

, driven by adoption of cloud-connected diagnostic tools. Management emphasized cost optimization initiatives in manufacturing, . .

To implement this strategy rigorously we need to pin down a few practical details: 1. Universe • Default I can use: all common stocks listed on NYSE + NASDAQ + NYSE Arca that were active at any point between 2022-01-03 and today. • Alternative: a narrower universe (e.g., S&P 500, Russell 1000) if you prefer faster turnaround. 2. Trade convention • Typical for 1-day “open the next day, close the same day” holding horizon is: – Rank stocks by the preceding day’s total traded value or share volume (here we’ll use share volume). – Buy the chosen basket at today’s close (or tomorrow’s open); liquidate at tomorrow’s close. • Default I will adopt unless you tell me otherwise: buy at today’s close, sell at tomorrow’s close, equal-weight across the 500 names. 3. Transaction costs & slippage • By default I will run the back-test frictionlessly; we can layer in realistic costs once we have the raw results. 4. Computing resources / run time • Pulling daily volume & price data for the whole US equity universe (≈6 000 tickers) from 2022 to now is feasible, but it takes several minutes and generates large intermediate files. • If you prefer faster execution we can restrict the universe.