Platinum plumbs four-week low, dollar tapers off

Platinum prices fell nearly two percent in American trade to July 20 lows, while the dollar index tapered off its high rise after three sessions of gains, amid a lack of data from the US today. 

As of 01:59 GMT, platinum prices fell 1.97% to $81.32 an ounce, marking four-week lows, while the dollar index slipped 0.18% to 96.18 against a basket of major currencies, moving off June 28, 2017 highs. 

US President Donald Trump warned Canada in another tweet while lauding Mexico "Deal with Mexico is coming along nicely. Autoworkers and farmers must be taken care of or there will be no deal. New President of Mexico has been an absolute gentleman. Canada must wait. Their Tariffs and Trade Barriers are far too high. Will tax cars if we can’t make a deal!".

Trump has repeatedly blasted the NAFTA trade deal with Mexico and Canada, describing it as the worst in US history and blaming it for harming US farmers and workers.