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On October 2, 2025,
(CHWY) closed with a 0.73% decline, trading with a volume of $0.23 billion, ranking 492nd among U.S. equities by dollar volume. The drop came amid mixed retail sector dynamics as e-commerce platforms faced renewed scrutiny over customer retention metrics. Analysts noted that while the company’s recent inventory optimization efforts have stabilized supply chains, persistent macroeconomic headwinds continue to weigh on discretionary spending patterns.Market participants observed that Chewy’s performance correlated with broader shifts in consumer confidence indices, particularly in the pet care subsector. Short-term traders highlighted the stock’s sensitivity to interest rate expectations, as rising borrowing costs disproportionately impact high-growth, low-margin retailers. Institutional positioning data suggested a modest increase in short interest, though no significant derivative activity was reported to directly influence the price action.
To build an accurate back-test I’ll need to pin down several practical details: Universe—Which market(s) should we draw the stocks from? (e.g., all U.S.-listed common stocks, only S&P 500 constituents, only NASDAQ, etc.) Should ADRs, ETFs and penny stocks be excluded? Ranking time & execution price—Do we rank by that day’s end-of-day dollar volume and then buy at the next day’s open? Or do we assume perfect execution at the same day’s close (i.e., a close-to-close hold)? Position sizing—Equal weighting across the 500 names, or weight by dollar volume, market-cap, etc.? Transaction costs / slippage—Should we incorporate commissions or a fixed bps slippage per trade, or assume frictionless trading? Benchmark & performance metrics—Any specific benchmark (e.g., SPY) or metrics you’d like to see? Let me know your preferences and I’ll set up the back-test accordingly.

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