Markets investors became richer by Rs 27.10 lakh crore as the BSE benchmark Sensex continued to rally for the sixth trading day, surging nearly 6 per cent during this period.On Monday, the 30-share BSE bellwether gauge jumped 1,078.87 points or 1.40 per cent to settle at an over six-week high of 77,984.38.During the day, the benchmark zoomed 1,201.72 points or 1.56 per cent to 78,107.23.