Tariff signals, first executive actions and a Taiwan quake shape holiday headlines

U.S. markets were closed for Martin Luther King Jr. Day, leaving QQQ at $522.24 and SPY at $598.24 with no session move. Policy headlines moved from a report of no immediate new tariffs to consideration of 25% tariffs on Mexico and Canada, while first-day executive actions covered energy, manufacturing, border security and a 75-day TikTok reprieve. A Taiwan earthquake halted TSMC production, and updates from X, Apple and OpenAI added technology context.