The content originally appeared on: CNN A version of this story first appeared in CNN Business' Before the Bell newsletter. Not a subscriber? You can sign up right here. You can listen to an audio version of the newsletter by clicking the same link. London (CNN Business)For years, billionaire investor Warren Buffett has been sitting on a mountain of cash. But with stocks at record highs, he struggled to find deals that caught his eye. Now, with many other investors […]