New Delhi, Feb. 23 -- President Donald Trump's new 15% global tariff is causing uncertainty and confusion among investors and international lawmakers alike.

Trump announced the move Sunday, up from a 10% rate, after the Supreme Court struck down levies the administration imposed under the International Emergency Economic Powers Act Friday.

Stock futures pointed lower early Monday, reversing Friday's rally, while haven assets gold and silver rose. Investors don't quite know what to make of it all.

Well, the combined effect of the ruling and the new levies is actually a reduction in the increase of the effective tariff rate since the beginning of 2025-to 9 percentage points, from 10, Goldman Sachs analysts estimated in a note Sunday.

Th...