Warren Buffett loses $1 billion in just 2 days after Kraft Heinz disappoints again

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· *Warren Buffett took a $1 billion loss after Kraft Heinz stock plunged 11% in two days this week.*
· *Berkshire Hathaway's 27% stake in the food giant shrank in value to $8.7 billion from $9.8 billion between Thursday and Friday.*
· *Kraft Heinz reported sharp declines in fourth-quarter sales and profits on...