Cowen & Co. analyst Matthew Ramsay picked Advanced Micro Devices Inc. AMD, -3.82% as one of his firm's best ideas for 2019, citing the company's move to 7-nanometer as an important catalyst. While Ramsay acknowledges that meaningful share gains take time, he argues that this lineup refresh would signify AMD's "first manufacturing advantage versus Intel INTC, -2.26% " as well as the "continued execution of the company's strategic vision." He said that crypto-related woes make for a "difficult set-up" in the first half of next year, but those issues shouldn't preclude AMD from picking up share in other businesses, growing earnings, and improving its margin profile. AMD shares are up 3% in premarket trading Tuesday, and they've gained 94% so far this year. The S&P 500 SPX, -2.37% has fallen 1.3% in that time.