South Indian Bank on Thursday reported a 13.88 per cent decline in March quarter net profit to Rs 287.56 crore. The private sector bank posted a net profit of Rs 333.89 crore in the January-March period of the 2022-23 fiscal year.Total expenditure increased to Rs 2,187 crore in the March quarter, from Rs 1,757 crore in the same period a year ago, South Indian Bank said in a regulatory filing.