Veteran investor Warren Buffett has lost over $700 million on his investment in U.K. supermarket operator Tesco, which has seen shares fall around 43 percent this year.
Buffett, often referred to as the Oracle of Omaha, has consistently backed Tesco, holding a stake in the firm since 2007. But his investment firm Berkshire Hathaway is now dealing with a hefty loss after the retailer slumped over 20 percent in the last month.
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