The S&P 500 index has experienced a decline of 0.36% over the past 30 days, reflecting a challenging environment for investors. In the large-cap segment, Vertiv Holdings Co. emerged as a standout performer, achieving a remarkable return of 24.49%. Conversely, CBRE Group, Inc. struggled, posting a loss of 12.24%. In the mid-cap category, GLOBALFOUNDRIES, Inc. led the way with a return of 16.32%, while Zillow Group, Inc. faced difficulties, recording a decline of 16.54%. The small-cap sector saw Teradata Corp. shine with an impressive return of 29.59%, whereas Rapid7, Inc. faced significant challenges, with a loss of 28.97%. Overall, the advance-decline ratio across the market indicates a tough day for stocks, with 1,724 advancing and 2,595 declining, resulting in a ratio of 0.66. In large-cap stocks, the ratio was more favorable at 1.36, with 135 advancing against 99 declining. Mid-cap stocks showed a near balance with 130 advancing and 131 declining, while small-cap stocks struggled with 615 advancing and 837 declining, yielding a ratio of 0.73.