Dow, S&P 500, Nasdaq futures edge higher; Palantir, Caterpillar lead advances

US stock futures rose on Tuesday, August 4, as tech shares led the market higher. Palantir soared over 16% after strong second-quarter results, while Caterpillar gained 6% following positive earnings. Investors now track upcoming reports from AMD and Spotify while keeping a close watch on ongoing developments in West Asia.