Palantir CEO Alex Karp described the second quarter as "otherworldly." Separately, Amazon's market capitalization milestone was driven by surging hyperscaler stocks on strong earnings, which also provided cover for its massive AI capital expenditure plans. Meanwhile, US stock futures are modestly higher on Tuesday, with S&P 500 futures up 0.1% and Nasdaq-100 futures up 0.6%. Markets are also focused on SpaceX's first quarterly earnings report since going public, due after the bell, and the latest JOLTS data ahead of Friday's July jobs report.