In today's market summary, the S&P 500 index experienced a modest increase of 1.97%, although it has seen a slight decline of 0.18% over the past 30 days. The overall market showed a strong advance-decline ratio, with 3,562 stocks advancing compared to 828 declining, resulting in a ratio of 4.3 to 1. Among large-cap stocks, MicroStrategy, Inc. stood out as the top performer with a return of 26.11%, while Amazon.com, Inc. faced challenges, recording a decline of 5.55%. In the mid-cap sector, Credo Technology Group Holding Ltd. led with a return of 13.6%, whereas VeriSign, Inc. struggled, posting a loss of 7.6%. Small-cap stocks saw Bill Holdings, Inc. excel with a remarkable return of 37.16%, while Molina Healthcare, Inc. faced significant losses, down 25.51%. The advance-decline ratios across market caps reflected a healthy market sentiment, with small caps showing the strongest performance at 5.51. Overall, the market dynamics indicate a mix of strong performers and notable underperformers across various sectors.