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On October 7, 2025,
(COST) closed with a 0.42% gain, trading with a daily volume of $2.37 billion ranked 34th in market activity. The stock's performance reflected mixed sentiment ahead of its upcoming earnings report, though no material news directly influencing the move was reported in monitored channels.Recent market commentary highlighted potential tailwinds from holiday season demand, with analysts noting Costco's historical resilience in inflationary environments. However, no new corporate announcements or regulatory developments were disclosed during the period. The stock's trading pattern remained within established ranges, with no significant deviations in volume or price action compared to recent averages.
To execute this back-test accurately, several parameters require clarification: the stock universe (all U.S. common stocks or a specific index), portfolio construction methodology (equal-weighted or volume/market-cap weighted), transaction cost assumptions, and benchmark selection. Once these parameters are defined, the strategy can be simulated from January 1, 2022, to the present to generate performance statistics.

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