Deutsche Telekom AG  (DTEGY)  shares traded sharply lower Tuesday following reports that Sprint Corp.  (S - Get Report)  may push back its merger talks with T-Mobile U.S., a unit of the German carrier, until later in the summer as it pursues a partnership with cable groups Charter Communications (CHTR - Get Report) and Comcast Corp.  (CMCSA - Get Report)

Sprint shares were trading 7.99% higher in premarket trading Tuesday, with expectations that it would open at $8.65, after closing at $8.01 on Monday. Comcast shares were marked to open 0.4% higher.

Deutsche Telekom shares were marked 2.3% lower in the opening 30 minutes of trading in Frankfurt to change hands at €16.25 each and erase all of the stock's year-to-date gains.

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This article was written by a staff member of TheStreet.