The Dow was lower by around 450 points, or 1%, in early-afternoon trading, the S&P 500 lost 1.4% and the Nasdaq Composite was down by 1.9% after a selloff in Big Tech stocks. Shares of Tesla (TSLA) fell by around 4.

Wall Street limped to a downbeat end of the trading week on Friday as a sell-off in Big Tech stocks dragged the Dow Jones Industrial Index down by more than 500 points at one point during the session.

Wall Street’s holiday cheer ended abruptly today, with all three main benchmarks slumping in a broad-based sell-off affecting even tech and growth stocks that had driven markets higher through much of the shortened trading week.

The tech-heavy Nasdaq Composite fell 1.58% while the S&P 500 lost 1.12%. The Dow Jones shed 333 points to end the day.

The main indexes sold off at the open and stayed lower through the close, putting the Santa Claus rally at risk.

Stocks edged lower on Wall Street Thursday morning as U.S. markets reopened for trading after the Christmas holiday. The S&P 500 fell 0.2%. The benchmark index is coming off a three-day winning streak.