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Fastenal (FAST) rose 1.78% on September 26, 2025, with a trading volume of $240 million, ranking 436th in market activity for the day. The industrial fastener supplier’s shares saw increased liquidity, reflecting investor interest in its market position and operational performance.
To conduct an accurate back-test, several practical details about the trading strategy’s implementation must be clarified. Key considerations include the stock universe (e.g., all U.S. common stocks on NYSE, NASDAQ, and AMEX), rebalancing timing (e.g., executing trades at the day’s close and unwinding the next day), weighting schemes (e.g., equal-weighting 500 stocks or using volume-proportional adjustments), frictional costs (e.g., assuming zero transaction costs or incorporating spread estimates), and benchmark comparisons (e.g., versus SPY). Default assumptions include an equal-weighted portfolio of 500 stocks with no transaction costs, using the same-day close for entry and the next-day close for exit, and comparing results against the S&P 500 benchmark. Confirmation or adjustments to these parameters are required to proceed with data retrieval and back-testing.

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