Founding and operation The Sioux City Grain Exchange was established on October 14, 1907, as the Sioux City Board of Trade by Fred L. Eaton, Clarence A. Knapp, and Granville B. Healy with the purpose to "foster and promote trade and commerce in Sioux City and to establish and maintain commercial and financial exchanges". It was first headquartered in the Grain Exchange Building (formerly Garretson Hotel) at 507 5th Street, which was destroyed by a fire on May 24, 1914. A second headquarters, also called the Grain Exchange Building (Insurance Exchange today), was built in 1916 at 507 7th Street. Following
Roaring Twenties growth, the Sioux City Board of Trade reincorporated as the Sioux City Grain Exchange on June 28, 1922. It relocated to the sixth floor of the Warnock Building (Benson Building today) at 705 Douglas Street in March 1928 and added a state-of-the-art cereal laboratory staffed with chemists to its inspection, grading, weighing, and storage services which operated under the license and supervision of the
United States Department of Agriculture. The trading floor operated Monday through Friday, 9:30a to 1:30p central standard time.
Rise By the 1920s, SCGX was doubling annually and had emerged as the "fastest growing grain market in the world"; finally opened commercial navigation of the Missouri River and helped establish the
Missouri River Basin Project, which included development of the
Gavins Point Dam. The alternate transportation succeeded in breaking the railroad's monopoly. By the 1970s, SCGX was among the largest exchanges in the world; transacting over 100 million bushels annually (valued at $1 billion as of 2018).
Decline == Gallery ==