S&P:S&P Says Tesla Inc. Upgraded To 'Bb+' On Solid Demand Prospects And Robust Financial Metrics; Outlook Positive.S&P, On Tesla, Says Positive Outlook Reflects Our View That Tesla'S Free Operating Cash Flow Generation Will Remain Positive More Consistently.S&P Says Despite Semiconductor Shortages, Other Supply-Related Bottlenecks, Tesla Appears To Have Minimized Production Disruption Versus Most Automakers.S&P Says View On Tesla Also Reflects Outperformance Of Electric Vehicles (Evs) So Far This Year Globally.S&P Says Key Risks Going Forward Include Access To Supply As Tesla Looks To Raise Cell Capacity And Complete Its Production Ramp-Up To Meet Demand.S&P Says Despite Near-Term Supply Bottlenecks For The Industry, We Expect Tesla Deliveries And Earnings To Remain Strong Over The Next Few Quarters.Further Company Coverage: Tsla.O. ((Reuters.Briefs@Thomsonreuters.Com;)).