Investors turned richer by over ₹4.5 lakh crore on Monday as Sensex ended 1,335 points higher at 60,612, primarily led by the merger announcement of HDFC and HDFC Bank. Data showed that investor wealth, measured by the combined market capitalisation of BSE-listed companies, rose to around ₹272.46 lakh crore. Investors of HDFC group companies gained over 1 lakh crore.