The FTSE 100 index experienced a notable decline, falling by 1.4% today and down 1.54% over the past five days. Over the last month, the index has dropped by 2.08%, reflecting a challenging environment for large-cap stocks. In the large-cap segment, Intertek Group Plc emerged as the top performer with a return of 5.95%, while HSBC Holdings Plc struggled, recording a loss of 5.86%. Mid-cap stocks saw Spirax-Sarco Engineering Plc lead with a return of 3.86%, contrasted by Entain Plc, which faced a decline of 6.45%. Small-cap stocks showed a mixed performance, with Filtronic Plc achieving a remarkable return of 21.95%, while PureTech Health Plc lagged with a loss of 9.22%. Overall, the advance-decline ratio across the market indicated that 163 stocks advanced compared to 257 that declined, resulting in a ratio of 0.63x. In the large-cap category, only 13 stocks advanced against 43 that declined, yielding a ratio of 0.3x. The mid-cap and small-cap segments also reflected a similar trend, with ratios of 0.51x and 0.65x, respectively.