AAPL's $750M Volume Surge Propels It to 135th Rank as ADP Slides 0.75%

On September 16, 2025, , . . Meanwhile, .

Recent market activity for Automatic reflects heightened institutional interest, . , . However, technical indicators remain mixed, .

For a rigorous back-test, several parameters require clarification: 1. **Universe Definition** – Should the selection criteria include all actively traded stocks or focus on a fixed index like the S&P 500? 2. **Execution Parameters** – Will trades be executed at close-to-close prices or open-to-close? 3. **Portfolio Construction** – Should the 500 highest-volume stocks be equally weighted or adjusted by volatility metrics? 4. **Cost Assumptions** – Are transaction costs and slippage to be factored into the calculation? 5. **** – Does the analysis require cumulative returns alone or additional risk-adjusted metrics like Sharpe ratio? Finalizing these details will enable the generation of a data-retrieval framework to execute the back-test accurately.