The tech-heavy Nasdaq Composite is on track for its first losing month since March. Michael Nagle/Bloomberg/Getty Images New York —

For months, it felt like nothing could knock stocks off their steady ascent — but November has been a rough month on Wall Street.

The tech-heavy Nasdaq Composite is down more than 3.5% this month and on track for its first losing month since March. The Nasdaq has shed almost $2 trillion in market value in two weeks as investors have dumped tech stocks.

Stock futures were lower Friday morning, pointing to another volatile day: Nasdaq 100 futures were down 1.4%. Meanwhile, S&P 500 futures fell 0.9%. Dow futures were down 283 points, or 0.6%.

The benchmark S&P 500 is down more than 1.5% this month while the Dow is slightly in the red. The S&P 500 has

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