Warren Buffett's Berkshire Hathaway has likely plowed billions into stocks and buybacks, investor Bill Ackman predicts

· *Warren Buffett's Berkshire Hathaway may have spent billions on share buybacks and other stocks during the market meltdown, hedge fund chief Bill Ackman said on the The Knowledge Project podcast.*
· *"I'm surprised they haven't done anything yet that's visible, but my guess is they've been buying stocks a lot," the Pershing...