Thursday's trading session has presented significant movements among stocks, particularly within the mega-cap and large-cap segments. Market participants have witnessed notable declines in heavyweight stocks like UnitedHealth Group (UNH) and Tesla Motors (NASDAQ:TSLA),

U.S. stock markets experienced a downturn on Thursday, with the Nasdaq Composite shedding over 170 points and ending the day at 19,338.29.

U.S. stock indexes drifted lower Thursday following a mixed set of earnings reports from Morgan Stanley, UnitedHealth Group and other big companies. The S&P 500 slipped 0.2% after flipping between small gains and losses through the day.

S&P 500 slides 0.6% as Palantir drops 4% and Moderna tumbles 23%. Rising Treasury yields and upcoming CPI data keep traders on edge.

U.S. stocks erased a modest early gain, with the S&P 500 struggling to tally a fourth-straight advance. The index was marginally lower in recent trading, although it was outperforming both the Nasdaq Composite and the Dow.

NEW YORK — U.S. stock indexes drifted lower Thursday following a mixed set of earnings reports from Morgan Stanley, UnitedHealth Group and other big companies.

In its first results since its insurance unit CEO was fatally shot in New York City, UnitedHealth Group reported Thursday weaker-than-expected fourth-quarter revenue, prompting its shares to fall in early morning trading despite quarterly profit beating projections.

Stocks closed sharply higher Friday, sending the S&P 500 and Dow Jones Industrial Average to their biggest weekly gains since the week of the November presidential election.

Witty's comments came during the company's first earnings call since the killing of Brian Thompson, the CEO of the company's insurance arm UnitedHealthcare.

The Federal Trade Commission said three top pharmacy suppliers made profits of 7,700 percent on a lifesaving hypertension drug.

Shares were mostly lower in Asia on Friday after China reported that its economy grew at a 5% annual pace last year, hitting the government’s target but slowing from the year