Mercantile Discount Bank (MDB) is a banking institution based in Tel Aviv, Israel. The bank provides portfolio management, financing, securities trading, and underwriting services. the bank was established in 1971 by the Barclay's Bank and by the Israel Discount Bank, under the name Barclay's Discount Bank but commenced its operations in 1981. Mercantile Discount Bank operates as a subsidiary of Israel Discount Bank. The assets of the firm are managed by the management team.