Dollar Tree holiday-quarter forecast disappoints as tariffs bite; shares fall

(Reuters) - Dollar Tree Inc on Tuesday forecast holiday-quarter profit below Wall Street expectations, as the discount store operator expects a hit from U.S. tariffs on Chinese imports, sending its shares down about 8% before the opening bell.The tariffs as part of the prolonged trade war between Washington and Beijing have been a pressure point for retailers, which source a large chunk of their merchandise from China.The company said it expects fourth-quarter profit in the range of $1.70 to..