US stocks sank on Friday as technology firms led a broad-sweeping decline across each major index.

The tech-heavy Nasdaq Composite fell 1.49% while the S&P 500 lost 1.11%. The Dow Jones shed 333 points to end the day.

"I think what you see today is a lack of faith," UBS senior portfolio manager Alan Rechtschaffen told CNBC , citing uncertainty around trade and productivity.

A sell-off in government bonds is also weighing on equity appetite, with the 10-year Treasury yield now trading above 4.6%. Bond traders may be adjusting to expectations of higher-for-longer interest rates next year, and are monitoring how the Trump administration responds to rising fiscal deficits.

Despite Friday's sharp decline, indexes remained in the green for the holiday week. Investors may still be holding out for stocks to rally into the year-end, as is typical during the last five trading days of the year.

While gains have been made during the holiday-shortened week, it could bode ill if the so-called Santa Claus rally fails to manifest.

"When Santa doesn't show up and stocks are lower over this period, the S&P 500 has generated an average January and forward annual return of -0.02% and 5.0%, respectively," Adam Turnquist chief, technical strategist for LPL Financial, wrote this week.

Here's where US indexes stood shortly after the 4:00 p.m. closing bell on Friday:

Here's what else is happening:

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