The industry's equity assets under management (AUM) rose to Rs 3.64 lakh crore last month, from Rs 2.83 lakh crore in December 2014, according to Association of Mutual Funds in India (AMFI).
In November, the asset base of equity MFs read Rs 3.62 lakh crore.
Despite a 6 per cent slump in the BSE benchmark Sensex in 2015, investors pumped in money into equity schemes.
Furthermore, the MF industry expects to attract a larger share of the Indian households' savings from this year too, given the sluggish trend in the real estate market and a continued fall in gold prices.
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In 2015, equity and equity-linked saving schemes saw an infusion of about Rs 90,600 crore. However, many investors are shying away from gold as it continues to perform below par.
Gold ETFs have seen an outflow of Rs 891 crore during the period under review.
Mutual fund is an investment vehicle with a pool of funds collected from investors to buy securities such as stocks, bonds, money market instruments and similar assets.