Bank of America Merrill Lynch has downgraded public sector lenders Bank of Baroda and Union Bank of India on slowing growth and impact on earnings from mark-to-market losses in their bond portfolios.
Bank of Baroda shares are down 5.22%, while United Bank of India has fallen 4.65%.
Bond yields surged sharply after the central bank began tightening short-term liquidity last month in order to arrest the rupee decline.
State-controlled banks typically hold large portfolios of government securities in the available-for-sale (AFS) category rather than in the held-to-maturity (HTM) category, which means a drop in bond yields has to be recorded as a capital loss on their balance sheets.
The brokerage says it expects MTM losses of at least Rs 3-4 billion for Bank of Baroda, estimating that the lender has an AFS book of 21% of its bond portfolio.
It cut the bank's rating to "neutral" from "buy".
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It valued United Bank of India's AFS book at 17% of its bond portfolio, re-rating the stock to "underperform" from "neutral".