RSM US LLP (RSM), a Dayton Area Chamber of Commerce member, and the U.S. Chamber of Commerce have joined forces to present the RSM US Middle Market Business Index (MMBI)—a first-of-its-kind middle market economic index developed in collaboration with Moody’s Analytics. The MMBI is designed to accurately reflect business conditions in the U.S. middle market, while providing a statistically significant measure of the health and outlook for these businesses.