U.S. stocks sunk Friday with the Nasdaq Composite notching its worst month since 2008, as Amazon became the latest victim in April's technology-led sell-off.

The tech-heavy Nasdaq Composite fell nearly 4.2% to 12,334.64, weighed down by Amazon's post-earnings plunge. The S&P 500 retreated by 3.6% to 4,131.93. The Dow Jones Industrial Average shed 939.18 points, or close to 2.8%, to 32,977.21.