Driven by addition in equity fund folios, mutual fund houses registered a surge of more than 36 lakh investor accounts in the first seven months of the current fiscal. This takes their total tally of investors to 5.13 crores. Investor accounts have increased in the last two years mainly due to robust contribution fromsmaller towns. According to data from the Association of MutualFunds in India mutual funds have reported a net inflow of over 31,000 crore rupees in equity schemes in the first half of the current fiscal.