Astera Plunges 2.26% on $1.24 Billion Volume Slide to Market Rank 69

On September 25, 2025, Astera (ALAB) closed at a 2.26% decline, with a trading volume of $1.24 billion, marking a 55.04% drop compared to the previous day. This placed the stock at rank 69 in terms of trading activity within the broader market.

To execute a back-test for the "equal-weighted top-500 volume" portfolio strategy, several parameters require clarification. The universe definition is critical—users must decide whether to screen all U.S.-listed equities or limit the scope to indices like Russell 3000 or S&P 500. Illiquid securities or those with limited trading histories may need exclusion to ensure robustness.

Rebalancing methodology entails ranking daily dollar volume, selecting the top 500 stocks, and applying equal weights. While this approach assumes a one-day holding period, adjustments to weighting schemes (e.g., market-cap or dollar-volume based) can be considered. Transaction costs, though minimal for a single-day strategy, should be accounted for given the high turnover of 500 positions daily.

Data coverage spans from January 3, 2022, to September 25, 2025. Aggregating component returns into a synthetic portfolio is necessary for performance analysis, as the platform’s tools are optimized for single-ticker or index back-tests. Finalizing the outlined parameters will enable the detailed data pull and back-test execution.