(CNBC) — Tech stocks are back in correction territory after a painful day for public exchanges.

The tech-heavy Nasdaq Composite index fell nearly 4 percent, with tech stocks like Apple, Amazon, Alphabet and Facebook weighing most heavily.

In total, the so-called FAANG stocks — Facebook, Amazon, Apple, Netflix and Alphabet-owned Google — shed more than $140 billion in market value by the end of the trading Tuesday.

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