...S&P Global Ratings assigned its '##+' long-term rating to the Oklahoma Development Finance Authority's approximately $966 million series 2018B tax-exempt fixed-rate bonds and $246 million series 2018C taxable fixed-rate bonds issued for OU Medicine Inc. (OUMI). The outlook is stable. OUMI expects to have Assured Guaranty insure $100 million of the tax-exempt issuance. Effective Feb. 1, 2018, OUMI owns and operates OU Medical Center (OUMC), a 341-staffed bed academic medical center (AMC) hospital in Oklahoma City, along with OUMC - Edmond (located about 15 miles north of OUMC with 66 staffed beds). OUMI also leases and operates the 312-staffed-bed Children's Hospital at OUMC as well as owns and operates clinics, imaging, and other health-related services across the service area. OUMC and The Children's Hospital are on the same campus as the University of Oklahoma Health Sciences Center (OUHSC), the state's main health sciences education and research facility. For roughly the past 20 years,...