sentences:  It has offices in New York City and Washington, D.C.The combined businesses of SIFMA’s bank, broker-dealer and asset management members represent 75% of the U.S. broker-dealer sector by revenue and 50% of the asset management sector by assets under management.In January 2010, SIFMA announced that it had hired the law firm Sidley Austin to consider filing a lawsuit challenging the Obama administration's banking levy.