Trade Desk falls 4% due to index removal; programmatic ad-tech sector repriced amid mixed peer moves.

Trade Desk's stock dropped 4% following its removal from the S&P 500 index, triggering mechanical selling by passive funds. This decline is part of a broader repricing in the programmatic advertising sector, as seen in similar drops for Magnite, while AppLovin remains relatively stable. The selling pressure is expected to ease once index-related adjustments finish, with future stock performance depending on Trade Desk's earnings and customer retention. Investors are advised to be cautious and watch for signs of stabilization after passive fund selling ends.

Trade Desk (TTD) trades at USD 13.36 on Pluang, down 3.78% as of Sep 22, 2026 23:12 WIB, reflecting ongoing selling pressure after its S&P 500 removal. The stock's market cap stands at $6.56 billion with a typical hold time of 71 days on Pluang. Meanwhile, AppLovin (APP) shows more stability, trading at USD 327.93 with a smaller 0.68% decline and a market cap of $110.49 billion, indicating less volatility in the broader tech sector during this period.