Warren Buffett's Berkshire Hathaway has been downgraded to 'sell' by Stifel Nicolaus analyst Meyer Shields and his team.
Shields previously had a 'hold' recommendation on the stock.
In a note for clients, Shields says a "blah-shaped" economic recovery has not been priced into Berkshire's stock price. "Our weak macroeconomic outlook implies poor 2H10 earnings" for the company's operating companies."
There's also a "doubly whammy" for Berkshire. Shields says a weaker economy will hurt Berkshire's holdings and derivatives contracts. "Investors' focus on Berkshire's book value for valuation imply that its shares could outpace broader market's declines."
Shields discussed his call in a live appearance on CNBC's Fast Money Halftime Reporttoday.