Markets edge lower as Alphabet and Tesla loom for earnings

U.S. stock futures slipped ahead of Alphabet and Tesla's second‑quarter results, with Dow, S&P 500, and Nasdaq futures down modestly as investors weigh AI spending, tariffs, and rising oil prices. In premarket trading, Super Micro Computer jumped on a record backlog while Dell and AT&T moved higher, and broader headlines—tariff changes and geopolitical tensions—kept sentiment cautious ahead of the open.