MUMBAI : RBL Bank-backed Utkarsh Small Finance Bank (USFB), which mainly gives microfinance loans in Bihar and Uttar Pradesh, has begun work on its initial public offering (IPO), three people aware of the matter said. “The bank is presently in the process of appointing investment banks for its proposed IPO, which is expected to be around ₹500 crore in size,” said one of the three people, all …