Remarks uttered by the CEO of T-Mobile US (NASDAQ: TMUS) on Monday weren't exactly well received by investors. Absent any other market-moving news about their stock, they traded out of the No. 3 mobile carrier assertively.

T-Mobile shares are backsliding after Chief Executive Mike Sievert hinted that fourth-quarter subscriber figures might underwhelm them. Its stock, which has more than tripled over the past five years,

ET: CEO clarifies comments made at Monday's UBS conference.  Following a sharp negative reaction to comments made on Monday at the UBS Global Media and Communications Conference, T-Mobile CEO Mike Sievert clarified remarks he made that were misinterpreted by media at the event.