- Trade Desk shares ( TTD.O ) plunge about 25% after earnings, hitting a near eight-year low in early trading. - The selloff puts Trade Desk on track to become the smallest company in the S&P 500 by market capitalization. - The ad-tech firm forecasts third-quarter revenue of **$650 million**, well below analysts' estimate of **$805.1 million**, according to LSEG-compiled data. - It reported second-quarter revenue of **$715 million**, missing the consensus estimate of **$751.4 million**. - CEO Jeff Green said the quarter "did not meet the standard we set for ourselves". - At least 20 brokerages cut their price targets on the stock following the results, LSEG data showed. - Year to date, the stock is down about 63%.