This investment signifies Buffett's re-entry into UNH after liquidating his entire position back in 2010, indicating that he perceives significant value at

The sell-off phase in Medicaid provider UnitedHealth (UNH) is over. News that Berkshire Hathaway (BRK) took a position in UNH stock at anywhere from over $600 to as low as around $250 ended the stock decline.

Berkshire Hathaway just disclosed that it dumped $1.6 billion into a sinking ship, and Wall Street instantly paid attention.

The company may be under criminal investigation for alleged irregularities in its Medicare business—but it's been touched by the Warren Buffett effect.

Warren Buffett’s Berkshire Hathaway revealed a position in embattled healthcare giant UnitedHealth Group while showing smaller stakes in longtime holdings Apple and Bank of America, according to a regulatory filing Thursday.

Berkshire Hathaway’s portfolio added six new stocks, including the three new secret stocks. Warren Buffett was a net seller of stocks for the eleventh straight quarter.

Bloomberg journalists discuss today's biggest winners and losers in the stock market. Listen for analysis on the companies making news on Wall Street.

Here are three of the stories Wall Street is watching on Friday, Aug. 15. Retail sales in July rose 0.5% from the month prior, slightly below the 0.6% economists polled by Bloomberg were expecting. US President Donald Trump and Russian President Vladimir Putin are meeting today in Alaska.