Dec. 27 (UPI) -- Wall Street limped to a downbeat end of the week on Friday as a sell-off in Big Tech stocks dragged the Dow Jones Industrial Index down by nearly 500 points at one point during the session. The Dow peaked at 43,248 early in the day's trading and then plunged 477 points to 42,761 shortly after 12 p.m. EST, losing more than 1% before paring back some of the session's setbacks. Advertisement Likewise, the S&P 500 lost 1.7% and the tech-heavy Nasdaq Composite was down by a thumping