Canada's industrial product price index (IPPI) annually rose 2.9% in July, marking the fourth straight year-on-year increase last month, according to figures released Wednesday. The annual figure for June was slightly revised up to a gain of 2.9%, from an increase of 2.8%. The biggest contributors to the year-on-year increase in July were unwrought gold, silver, platinum group metals and their alloys which gained 25.3%, while unwrought aluminum and aluminum ...