On Friday, government data showed that U.S. retail sales rose 0.5% in July, the biggest gain in four months. The U.S. is to publish official data on producer price inflation, a leading indicator of consumer inflation, as well as government data on crude oil stockpiles, which can be a big market mover for the Canadian dollar, due to the size of Canada's energy sector. The loonie extended losses on Tuesday, falling to a six-month low as mounting fears over the global economic recovery weighed on risk sentiment.