Board of Governors of the Federal Reserve System (U.S.), 1935-. "Security Broker and Dealers, Unadjusted Net Flows, Millions," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 12, 1991," Z.1 Financial Accounts of the United States (1991-09-12) : 42-42. https://fraser.stlouisfed.org/title/93/item/69143/toc/475410 , accessed on April 19, 2024.