8th District - Net Interest Margin for Banks Geographically Located in Federal Reserve District 8: St. Louis (DISCONTINUED) was 3.56% in July of 2020, according to the United States Federal Reserve. Historically, 8th District - Net Interest Margin for Banks Geographically Located in Federal Reserve District 8: St. Louis (DISCONTINUED) reached a record high of 5.17 in January of 1994 and a record low of 3.41 in October of 2004. Trading Economics provides the current actual value, an historical data chart and related indicators for 8th District - Net Interest Margin for Banks Geographically Located in Federal Reserve District 8: St. Louis (DISCONTINUED) - last updated from the United States Federal Reserve on April of 2026.