Lockheed Martin profit up but forecasts lower cash flow in 2020; shares slip

(Reuters) - Lockheed Martin Corp raised its estimate for 2019 earnings on Tuesday as quarterly profit climbed 9.2% amid improved sales of its F-35 fighter jets, but shares fell in premarket trading after it forecast lower cash flow next year.The company estimated 2020 cash flow of $7.2 billion, lower than its 2019 year-end estimate of $7.6 billion, which disappointed investors and sent the stock down about 2.8% in premarket trading.Still, Lockheed raised its profit estimate for 2019 by 1.9% to..