Warren Buffett's Berkshire Hathaway moves in the 2nd quarter reflect 'caution in the current environment,' Morgan Stanley says

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· *Warren Buffett's Berkshire Hathaway equity portfolio value increased about 15% in the second quarter, according to a Monday note by Morgan Stanley. *
· *The company's new position in Barrick Gold is "potentially signaling caution given the uncertain macro environment," said analysts led by Michael Phillips. *
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