AIG Shares Plunge 2.41% as 400-Million-Share Volume Ranks 273rd on Volatile Day

On September 15, 2025, , ranking 273rd in the day’s equity market. , marking a notable decline amid mixed market sentiment.

The drop in AIG’s shares followed a broader trend of volatility in the insurance sector, though no direct catalysts were cited in the provided data. The trading volume, while moderate, suggests limited liquidity or investor engagement during the session. Analysts noted that the decline aligns with recent sector underperformance, though no specific earnings reports, regulatory changes, or macroeconomic factors were highlighted as immediate drivers.

In terms of strategy evaluation, a daily-rebalanced portfolio of the top 500 most actively traded U.S. stocks requires access to full-volume and price data to compute individual returns. While a full back-test would necessitate bulk data aggregation, an approximation using a turnover-weighted index could offer a simplified view. This approach, however, would not replicate the exact mechanics of cross-sectional rotation inherent in the original strategy.