Kolkata: The public listing of the National Stock Exchange has provided a Rs 1388 crore bonanza to Indian Bank, helping it to grow treasury earnings in the second quarter offsetting the adverse impact of higher bond yields.The one-time gain led to a 50% quarter-on-quarter surge in the bank's non-interest income -- which includes income from treasury operations -- at Rs 3953 crore while other state-owned lenders saw a dip in this parameter."The NSE listing also helped mark-to-market gains," Indian Bank managing director Binod Kumar told ET.The Chennai-headquartered lender owned 0.34% in NSE before the divestment using the offer for sale window during the initial public offer.