As Trump thunders, investors watch for rain

By Ross Kerber BOSTON (Reuters) - A dizzying stream of market-moving tweets and policy talk by President Donald Trump is finding a hopeful but anxious audience among professional investors looking to make stockpicking great again. After years of losing ground to index funds, portfolio managers and wealth advisers say Trump's assertive moves, like singling out individual companies, may create a chance to set their investment strategies apart - even if they think some of Trump's verbal assaults ar