Shares of tech companies were flat as valuation concerns lingered.
Pandora is adopting a practice common on rival music-streaming service Spotify, allowing users of its free version to pick songs if they sit through advertisements.
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French advertising technology company Criteo's shares slid after the company said a recent move by Apple to strengthen its ad tracker prevention would have a substantially negative effect on its revenue.
Rob Curran, firstname.lastname@example.org
(END) Dow Jones Newswires
December 14, 2017 17:37 ET (22:37 GMT)