In today's market summary, the S&P 500 index experienced a modest increase of 0.77%, reflecting a 0.41% rise over the past five days. However, the index has seen a decline of 0.37% over the last 30 days, indicating some volatility in the broader market. Among large-cap stocks, Advanced Micro Devices, Inc. emerged as the top performer with a return of 8.77%, while ONEOK, Inc. lagged behind with a decline of 5.08%. In the mid-cap sector, Keysight Technologies, Inc. led with a notable return of 23.05%, contrasting with Expeditors International of Washington, Inc., which fell by 7.22%. The small-cap segment saw Clarivate Plc shine with a remarkable return of 39.88%, while MultiPlan Corp. faced significant challenges, dropping 41.58%. The overall advance-decline ratio across the market showed 2,898 stocks advancing compared to 1,379 declining, resulting in a ratio of 2.1x. This positive trend was mirrored in large-cap stocks with a ratio of 2.44x, mid-cap stocks at 2.9x, and small-cap stocks at 2.39x, suggesting a generally favorable market environment despite some individual stock struggles.