Jabil (JBL) Gains 2.68% Despite 45% Volume Drop, Ranks 273rd in Market Activity

Jabil (JBL) closed 2.68% higher on Sept. 26, 2025, with a trading volume of $0.37 billion, marking a 45.14% decline from the prior day’s volume and ranking 273rd in market activity. The stock’s performance came amid mixed market sentiment, with analysts noting short-term volatility linked to sector-specific dynamics.

Recent developments highlighted Jabil’s strategic positioning in the electronics manufacturing services sector, where demand for supply chain optimization remains a focal point. While broader market indices showed muted movements, Jabil’s shares attracted attention due to its exposure to nearshoring trends and cost-reduction initiatives reported in recent earnings calls.

To run this back-test accurately, I need to clarify a few practical details:

1. Stock universe • Should we consider all U.S. listed common stocks, or limit the universe (e.g., S&P 500 constituents, NYSE + Nasdaq, etc.)?

2. Execution price and timing • Do we “buy” at today’s close and exit at tomorrow’s close, or buy next day’s open and exit the same day’s close?

3. Transaction costs / slippage • Should we include assumptions for commissions or bid-ask spread? If so, what rates?

4. Capital allocation • Equal-weight each of the 500 names every day, or weight by dollar volume?

5. Benchmark (optional) • Any benchmark you’d like the results compared to (e.g., SPY)?

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