The S&P 500 index experienced a modest increase of 0.1% today, reflecting a slight uptick of 0.15% over the past five days. However, the index remains down by 1.39% over the last month, indicating ongoing volatility in the market. In the large-cap segment, Fiserv, Inc. emerged as the top performer with a return of 6.89%, while Cadence Design Systems, Inc. struggled, posting a decline of 5.34%. Mid-cap stocks saw Southwest Airlines Co. leading with a return of 6.16%, contrasting with Genuine Parts Co., which faced a significant drop of 14.56%. Small-cap stocks showcased notable performance, with Masimo Corp. achieving an impressive return of 34.22%, while Ocular Therapeutix, Inc. lagged behind with a decline of 21.28%. Overall, the advance-decline ratio across the market showed 2,084 stocks advancing against 2,219 declining, resulting in a ratio of 0.94. In the large-cap category, the ratio was balanced at 1.0, while mid-cap and small-cap stocks reported ratios of 0.96 and 0.91, respectively, highlighting a challenging environment for many investors.