Reuters: Renewable energy could be the next big theme for stock market investors, fund manager Jonathan Day at Morgan Stanley Investment Management said on Friday. “Investors are thinking very much about what is the next big move … (and) which sectors,” Day said. “Maybe we’ll see a resurgence of interest in green energy stocks. “There is a definite push from governments around the world to continue to reduce greenhouse gas emissions … and therefore companies that are focussed on …