Dow Jones futures hovered near flat early Thursday, while S&P 500 and Nasdaq futures dipped after Trump confirmed global auto tariffs, Investor's Business Daily. The move triggered a broad market sell-off Wednesday, with the Nasdaq diving over 2%. Growth stocks like Palantir, Rubrik, and Tesla reversed sharply after flashing buy signals earlier in the week. Defensive growth sectors like insurers and aerospace initially held up but lost ground as Wednesday's market sell-off intensified.