Stock futures rise as investors weigh new tariffs and Iran sanctions

Stock futures are higher Tuesday morning after a mixed session Monday, as investors weigh new tariff threats on Canada and a global sanctions plan targeting Iran announced by the Trump administration. The administration raised Canadian auto tariffs to 50% effective Jan. 1, 2027, while Treasury Secretary Scott Bessent detailed "Operation Economic Outcast" to isolate Tehran through secondary sanctions. Gold and crypto rose as investors hedged against the dollar, while Treasury yields and oil prices declined. Dick's Sporting Goods shares fell 15% premarket after missing second-quarter expectations and cutting its full-year outlook due to a challenging footwear market. Nvidia announced full production of its Groq 3 LPX rack, and United Airlines added international routes to less crowded destinations.