Stock market today: Nasdaq, Dow, S&P 500 under pressure as Trump doubles steel, aluminum tariffs on Canada

The S&P 500 has broken below a major support level, signaling a possible change in market direction

Dow drops again — falling nearly 600 points as Trump ramps up Canada trade war

S&P 500’s Slide Brings Huge Options Position Into Rare Focus

Stock losses gain momentum as 2025 sell-off rolls on

5 things to know for March 11: Dow plummets, Moscow drone attack, Tesla protests, Duterte arrested, NASA delay