...May 8, 2019 NEW YORK (S&P Global Ratings) May 8, 2019--S&P Global Ratings assigned its '###' long-term rating to the Loudon County Economic Development Authority, Va.'s series 2019A bonds, issued for Howard Hughes Medical Institute (HHMI), Md. S&P Global Ratings also affirmed its '###/A-1+' dual rating on Loudon County Industrial Development Authority, Va.'s series 2013A multimodal tax-exempt revenue bonds, series 2003A-F variable rate bonds, and 2009B variable rate bonds, issued for HHMI. S&P Global Ratings also affirmed its '###/A-1+' rating on Maryland Economic Development Corp.'s series 2008A and 2008B multimodal revenue bonds issued for HHMI. The outlook is stable. "The '###' long-term rating reflects our view of HHMI's exceptionally strong balance sheet, sound and successful investment policy, significant operating flexibility, and a governance and management philosophy of adjusting spending as needed to conserve current endowment strength," said S&P Global Ratings credit analyst...