Trade Desk (TTD) is on track to end this year as the worst-performing S&P 500 Index ($SPX) stock – and a Jefferies analyst warns 2026 is unlikely to be particularly exciting for the ad-tech firm either. According to James Heaney, TTD shares face a “double whammy” next year: rising costs and AI threats that make it increasingly difficult to recommend owning them at current levels. More News from Barchart At the time of writing, Trade Desk stock is down nearly 70% versus the start of 2025. www.barchart. ...