The TSX plunged 172.12 points on Friday to end the week at 11,569.65, as commodity prices tumbled, while the TSX Venture ended the day 7.39 points lower to 1,379.47.

The healthcare sector was the lone bright spot, climbing 2.7%, while metals and mining lost 2.5%, financials shed 1.6%, and the energy sector slid 1.8% as crude for August delivery fell 61 cents to $76.01.

Meanwhile, gold for August delivery declined $20.10 to $1,188.20 an ounce, as did the TSX Global Gold Index, which gave back 1.8%. Gold stocks on the move included Yamana Gold (TSX: T-YRI), down 2.3%, and Barrick Gold (TSX: T-ABX), which fell 1.9%.

In economic news, Statistics Canada reported that the composite leading index rose 1% in June, with growth concentrated in the manufacturing sector, while household spending and the stock market continued to moderate.

Meanwhile, the U.S. Department of Labor said that the Consumer Price Index declined 0.1% in June on a seasonally adjusted basis, led by a decline in the energy index.

On the TSX, shares of Tekmira Pharmaceuticals (TSX: T-TKM) added 48 cents to $1.82 as the company said that it has been awarded a new contract with the United States Department of Defense Chemical and Biological Defense Program through the U.S. Army Space and Missile Defense Command to advance an RNAi therapeutic using Tekmira's lipid nanoparticle technology to treat Ebola virus infection. In the initial phase of the contract, Tekmira says it is eligible to receive up to $34.7 million over the next three years.