It's been an unusually good year for stocks so far.
Wall Street has managed to weather or shrug off repeated worries over trade tensions with China, tariff threats against Mexico, Middle East tensions between the U.S. and Iran and the near constant headline risk posed by President Donald Trump's relentless tweeting on all things economic and political.
Set against that backdrop, patient investors have seen the best six months in decades coming as the bull market has passed its 10th birthday.
Legendary investor Warren Buffett has done OK, too.
Forty-three of the stocks in his Berkshire Hathaway portfolio as of the last declaration to the SEC went up during the first half of the year.
But even the greats hit some mulligans.
For Buffett, the four stocks in the Berkshire Hathaway portfolio that have lost ground this year are:
Sirius XM (SIRI) , off 2.3% to $5.58; Bank of New York Mellon (BK) , down 6.2% to $44.15; Kraft Heinz (KHC) , down 28% to $31.04 and Teva Pharmaceutical ADRs (TEVA) , down 40% to $9.23.
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