Ambac Financial Group, Inc., through its subsidiaries, provides financial guarantee products and other financial services to clients in the public and private sectors worldwide. It operates in two segments: Financial Guarantee and Financial Services. The Financial Guarantee segment offers financial guarantee insurance and other credit enhancement products, such as credit derivatives for public finance and structured finance obligations. It also provides financial guarantees for bond issues and other forms of debt financing. This segment sells its products in the U.S. public finance market, the U.S. structured finance and asset-backed market, and the international finance market.