Intensifying competition and several downbeat analyst takes pushed the stock down during the period.At times over the past five business days, there was lively trading in digital adtech specialist The Trade Desk (TTD -0.19%). Unfortunately for the company and its investors, much of that trading consisted of sales.On the back of a new partnership agreement signed by a well-capitalized rival, plus several analyst moves, the stock fell by more than 13% over the week, according to data compiled by S&P Global Ma ...