UAE's NMC Health tanks as Muddy Waters takes short position

(Reuters) - U.S. short-selling firm Muddy Waters said on Tuesday it has acquired a short position in NMC Health Plc , citing "serious doubts" about the hospital operator's financial statements and sending its shares down more than 20%.Short seller Carson Block's firm questioned the value of NMC's assets, cash balance as well as its reported profits and debts.In a research note, Muddy Waters cited inflated asset purchase prices and capital expenditures by NMC, calling them "hallmarks of..