New sanctions against Iran could stoke tensions between the U.S. and China, while risk appetite for Bitcoin returns.

Washington flexes its economic power against Canada and Iran, while the bond market pressures Trump administration.

Markets are bracing for more tests this week, including Nvidia's earnings, an inflation reading, and the Fed's Jackson Hole symposium.

New sanctions against Iran could stoke tensions between the U.S. and China, while risk appetite for Bitcoin returns.

Washington has launched an economic offensive against Iran and Canada — the two countries one would normally not lump together.