The Trade Desk's biggest problem may be an easy one to fix.From the start of 2020 through the end of 2024, shares of advertising technology (adtech) company The Trade Desk (TTD 3.75%) were up an impressive 352%, trouncing the comparable 82% return for the S&P 500. In fact, this market-trouncing performance helped land The Trade Desk a spot in the S&P 500 index earlier this year.However, 2025 has been rough for shareholders. As of this writing, The Trade Desk stock is down 63% year to date, making it the lou ...