The S&P 500 experienced a notable decline today, down 1.52%, reflecting a broader trend as it has decreased by 1.29% over the past five days and 1.67% over the last month. This downward movement is indicative of a challenging market environment, with a significant number of stocks underperforming. In terms of market performance, the advance-decline ratio across all stocks shows 1,181 advancing against 2,667 declining, resulting in a ratio of 0.44. Large-cap stocks fared slightly worse, with only 69 advancing compared to 148 declining, yielding a ratio of 0.47. Mid-cap stocks showed a more balanced performance, with 100 advancing and 148 declining, resulting in a ratio of 0.68. However, small-cap stocks struggled, with 424 advancing and 904 declining, also reflecting a ratio of 0.47. Among individual stocks, Intuit, Inc. stood out as the best performer in the large-cap category, posting a return of 6.43%. Conversely, Vertiv Holdings Co. was the worst performer, down 17.26%. In the mid-cap sector, Garmin Ltd. led with a return of 16.23%, while Lennox International, Inc. faced a decline of 20.97%. The small-cap segment saw Huron Consulting Group, Inc. excel with a remarkable return of 40.37%, while Parsons Corp. struggled with a significant drop of 35%.