Global markets steady as Iran sanctions plan spurs little reaction; bitcoin tops $80,000

Global markets steadied Tuesday as investors downplayed U.S. plans to expand sanctions on Iran, focusing instead on Nvidia's upcoming earnings. The Treasury stopped short of imposing penalties despite warnings, easing oil and bond yield pressures. European shares opened 0.3% higher, supported by defense stocks, while the dollar edged up against the euro and yen. Bitcoin crossed $80,000 for the first time since May, surging 30% in ten days, while gold dipped 0.6% to $4,624 per ounce. Traders monitored the breakdown in the dollar-yield correlation amid fiscal concerns, with attention turning to the Federal Reserve's Jackson Hole conference. Nvidia's results Wednesday dominate tech sentiment, given the difficulty of meeting lofty expectations.