The Dow Jones Industrial Average on Friday was set for its first record close of the year, riding a wave of recent market optimism and seeing a brief upward push from someone who hardly needs an introduction: Warren Buffett.

Amazon helped offset hot inflation, but breadth was weak. Applied Materials dived late on guidance. UNH rallied on Warren Buffett.

UnitedHealth shares clocked the largest one-day percent increase since March 2020, as tracked by Dow Jones Market Data Group. It was on pace for the best day in 17 years before giving back some of those gains. For the week, shares rose over 21%, the best week since May 2009. Still, the stock is down more than 50% over the past 12 months.

The Dow Jones Industrial Average opened at its highest levels on record on Friday after Warren Buffett’s Berkshire Hathaway disclosed a stake in one of its key stocks. The Dow was up 263 points, or 0.

Value-hunters with big stakes in a particular component kept one of the main U.S. equity indexes in positive territory.

Dow futures are getting a Warren Buffett boost this morning, while S&P 500 and Nasdaq-100 futures are more quiet

The Dow Jones Industrial Average gained from UnitedHealth shares jumping over 10% on Wall Street. Here's why market feel optimistic about the shares of the troubled insurance firm.

Shares of UnitedHealth Group surged nearly 14% on Friday after billionaire Warren Buffett's Berkshire Hathaway bought 5 million shares of the company, providing a shot in the arm for investors who think the health conglomerate will turn around under its new CEO.

The Oracle of Omaha once called this ratio "probably the best single measure of where valuations stand at any given moment."