Investors’ wealth surged Rs8.48 lakh crore in four days of market rally where the BSE benchmark has climbed nearly 2 per cent amid firm global trends. The market capitalisation (mcap) of BSE-listed companies jumped by Rs8,48,328.9 crore to Rs4,01,37,377.21 crore (Rs401.37 lakh cr or $4.84 trn) in four days.