Shares of UnitedHealth Group are surging before the market open Friday as Warren Buffett’s Berkshire Hathaway disclosed that it recently purchased shares of the beleaguered insurer.

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Yet as UnitedHealth's stock declined, Buffett's Berkshire Hathaway Inc. (BRK.B) (BRK.A) stepped in and bought 5.04 million shares, a stake valued at $1.57 billion as of June 30's close.

Although President Trump's tariff and trade policy is headline news, another factor is of far greater importance to the stock market.

Presently, he has 30% of his portfolio invested in two brilliant artificial intelligence (AI) stocks: 9% is allocated to ...

Circle Internet Group, the company behind the popular USDC cryptocurrency that tracks the U.S. dollar, climbed 1.3% despite reporting a larger loss for the latest quarter than analysts expected. It ...

Is this time different? "It better be," warns BofA strategist Michael Hartnett. By one metric, stock valuations are beyond ...