The S&P 500 index experienced a notable increase of 1.65% today, contributing to a robust 3.95% rise over the past five days and a 1.97% gain over the last month. This upward momentum reflects a mixed performance across market capitalizations, with a total of 1,915 stocks advancing compared to 2,052 declining, resulting in an overall advance-decline ratio of 0.93. In the large-cap segment, DoorDash, Inc. emerged as the top performer, boasting a return of 11.63%, while Fiserv, Inc. struggled, recording a decline of 10.92%. Mid-cap stocks saw Seagate Technology Holdings Plc lead with a return of 9.43%, contrasted by Fox Corp., which fell by 16.84%. The small-cap sector was highlighted by Intellia Therapeutics, Inc., achieving a remarkable return of 23.2%, while Astronics Corp. faced a significant drop of 21.16%. The advance-decline ratios varied across market caps, with large-cap stocks showing a healthier ratio of 1.42, while mid-cap and small-cap stocks reported ratios of 0.98 and 0.82, respectively. This data underscores the ongoing volatility and selective strength within the market.