United Surges 4.66% on $460M Volume Spike Ranks 223rd in Dollar Volume

On September 23, 2025, , , . The rally coincided with renewed focus on the company's strategic positioning in its core market amid evolving sector dynamics.

Analysts noted that the stock's performance aligned with broader investor sentiment favoring firms demonstrating operational resilience. While no direct earnings reports or executive statements were cited, market participants interpreted the volume spike as a signal of accumulating institutional interest. The stock's liquidity profile improved significantly, .

Backtesting parameters for the trading strategy remain under refinement. Key considerations include defining the universe of "top-500 by daily dollar volume" stocks, specifying weighting methodologies for portfolio construction, and addressing implementation constraints in multi-asset testing environments. Current limitations in single-ticker backtesting engines necessitate either proxy ETF usage or narrowed testing scopes to validate the approach effectively.

To rigorously back-test the idea, clarifications are required regarding: 1) Market scope for universe selection and volume measurement criteria; 2) Portfolio rebalancing frequency and cost assumptions; 3) Technical workarounds for multi-asset testing capabilities. The final methodology will depend on resolving these parameters to ensure accurate performance evaluation.