Communications services companies fell as traders hedged their bets on the outlook for growth in the sector.
Shares of cinema chain AMC Entertainment Holdings shares swung wildly, as "meme stocks" continued a recent bout of volatility that has rattled small investors this week.
Digital advertising veteran Anthony Katsur has been named chief executive of the IAB Tech Lab, a global nonprofit that promotes common standards and technology for digital advertising, at a moment of flux for the digital advertising industry.
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(END) Dow Jones Newswires