The stock declined 4.31 per cent to Rs 52.15 on BSE.
On NSE, it slipped 4.49 per cent to Rs 52.10.
The state-owned UCO Bank on Saturday reported a 50.76 per cent drop in net profit at Rs 256.70 crore for the first quarter on account of higher provisioning for bad loans.
The bank had a net profit of Rs 521.40 crore in April-June of 2014-15.
Total income also declined to Rs 5,169.09 crore during the first quarter, from Rs 5,395.17 crore a year ago, the company had said in a BSE filing.
Net NPAs also rose to 4.53 per cent as against 2.33 per cent as of June 30, 2014.