Cameco Shares Tumble 7.06% on $640M Volume, Rank 170th in Trading Volume

On September 16, 2025, , , . .

The price decline aligns with broader market sentiment in the energy sector, though specific catalysts for Cameco’s move remain unclear. Reduced liquidity, as indicated by the sharp drop in trading volume, could signal limited investor activity or strategic position adjustments. However, no direct operational or regulatory updates were reported to directly correlate with the stock’s performance.

I’m ready to run the test, but I need a bit of clarification first:

1. Universe definition

• Should we limit the stock universe to a specific market (e.g., all U.S.-listed equities)?

• Do you want an equal-weight allocation across the 500 names each day, or volume-weighted (or some other weighting)?

2. Data scope

Our current back-test engine operates on one ticker (or index) at a time.

• If your objective is to evaluate a portfolio of 500 names re-balanced daily, I would need to approximate that with an index or ETF that already aggregates many high-liquidity stocks (e.g., SPY or VTI) or break the test into multiple single-ticker simulations—both of which deviate from your original design.

Could you please confirm the market universe and weighting method, and let me know whether an index/ETF proxy is acceptable?