Stocks of cyber security companies were mixed Thursday, with a standout performance from Carbon Black, Inc. (CBLK - Get Report) in the regular session ahead of the announcement it's being acquired by VMware Inc. (VMW - Get Report) .
Among notable cyber security stocks, six rose while 12 fell.
The Nasdaq Composite Index fell 28.82 points, or 0.36%, to 7,991.39.
Eleven cyber-security stocks outperformed the Nasdaq Composite while seven lagged.
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