Housing Development Finance Corporation (HDFC) quarterly profit rose more than market estimates as the mortgage lender made a one-time gain by selling part of its stake in the initial public offering of its life insurance arm. HDFC registered a 7% rise in standalone Interest income to Rs 8683.36 crore in the quarter ended December 2017. A 5% rise in interest expenses to Rs 5545.69 crore saw net interest income (NII) grow 10% to Rs 3137.67 crore. Other income grew 3% to Rs 11.73 crore, which took total income up 10% to Rs 3149.40 crore. Operating expenses grew 12% to Rs 239.60 crore, after which OP grew 10% to Rs 2909.90...