South Indian Bank's profit rose to Rs 683 crore from Rs 434 crore in the year-ago period.The net interest income for the quarter fell 1% to Rs 868 crore, compared to Rs 875 crore in the previous fiscal quarter.The asset quality of South Indian Bank improved with gross NPA ratio declining to 3.20% from 4.30% in the previous quarter.The share price of South Indian Bank rose by more than 1% to reach an 11-month high, trading at Rs 28.10 apiece.