HDFC Bank, India's largest private sector lender, is seeking approval for a banking license in Singapore. The bank aims to tap into the Indian diaspora in Singapore for savings and term deposits, as well as cross-sell products like mortgages. HDFC Bank already has a presence in London, Hong Kong, and Bahrain. With a customer base of 93 million, the bank is expanding its reach overseas after a merger with Housing Development Finance Corp. last year.