Privacy concerns sent the markets down to a lower open with the Dow falling 53 points to 24,893. Nasdaq tumbled 62 points to 7419.

On the upside

KLA-Tencor (Nasdaq: KLAC) will acquire Orbotech (Nasdaq: ORBK) in a cash and stock deal valued at approximately $3.4 billion.

Activist investor Sherborne Investors acquired a 5% stake in Barclays (NYSE: BCS).

Fidelity National Financial (NYSE: FNF) will pay approximately $1.2 billion to acquire Stewart Information Services (NYSE: STC).

On the downside

Micro Focus International (NYSE: MFGP) cut its fiscal 2018 revenue forecast and announced the immediate departure of chief executive Chris Hsu.

Shares of Facebook (Nasdaq: FB) tumbled on news that Cambridge Analytica secretly collected data on 50 million users of the social media company.

A report that Apple (Nasdaq: AAPL) was developing its own MicroLED displays sent shares of Universal Display (Nasdaq: OLED) plummeting.

In the broad market, declining issues outpaced advancers by a margin of nearly 4 to 1 on the NYSE and by more than 5 to 2 on Nasdaq. The broader S&P 500 rose 4 points to 2,752. Bitcoin soared $313 to $8,548.