India’s main infrastructure lender is boosting the use of derivatives as falling interest rates are squeezing its margins, according to people familiar with the matter.The National Bank for Financing Infrastructure and Development, or NaBFID carried out transactions with a number of banks including JPMorgan Chase & Co., Standard Chartered Plc, Citigroup Inc. and Deutsche Bank AG, said the people who asked not to be identified because the information is private. These included index swaps and total return sw ...