Nov. 6 (Bloomberg) -- The following companies had unusual price changes in Canadian trading today. Stock symbols are in parentheses, and share prices are from today's close in Toronto.

The Standard & Poor's/TSX Composite Index slid 3.4 percent to 9,555.41.

Oil companies fell after crude oil slid to a 19-month low on signs that fuel demand will contract as the global economy slows.

Opti Canada Inc. (OPC CN) dropped 19 percent to C$2.84, the second-biggest drop on the S&P/TSX index. EnCana Corp. (ECA CN) lost 4.4 percent to C$57.60. Suncor Energy Inc. (SU CN) declined 11 percent to C$24.75. Addax Petroleum Corp. (AXC CN) slumped 5.5 percent to C$18.25.

AbitibiBowater Inc. (ABH CN) fell 13 percent to C$2.09, the most since Oct. 15. The world's largest newsprint maker said its third-quarter loss widened from the second quarter to $302 million, or $5.23 a share, because of costs to close mills.

AGF Management Ltd. (AGF/B CN) lost 4.1 percent to C$12.72. The Toronto-based manager of C$20.4 billion ($17.4 billion) in mutual funds cut 10 percent of its staff at a trust unit to reduce costs. The firm's assets have dropped by a third in the past year as investors pulled money and stock prices slid. AGF had net redemptions of C$214.2 million last month.

Canaccord Capital Inc. (CCI CN) fell 9.3 percent to C$5.76, the most in more than three years. Canada's largest independent brokerage by assets posted a second-quarter loss of 11 cents a share, excluding some items, as the global credit crisis crimped its investment-banking business. Analysts surveyed by Bloomberg expected a profit of 6 cents a share. The firm also suspended its dividend.

Canadian Natural Resources Ltd. (CNQ CN) dropped 12 percent to C$53.40, the most since Oct. 15. The country's third-largest energy company by market value cut production forecasts and slashed its capital budget almost in half, prompting a ``sell'' rating from Goldman Sachs Group Inc.

Molson Coors Brewing Co. (TAP/B CN) gained 2 percent to C$49.96. The third-largest U.S. beer maker said it bought almost 5 percent of Australia's Foster's Group Ltd. through a cash- settled swap arrangement with Deutsche Bank AG. Foster's doesn't know Molson's intentions for the stake, the Melbourne-based brewer said in separate statement.

Pason Systems Inc. (PSI CN) climbed 10 percent to C$11.90. The provider of oilfield-instrumentation systems declared a semi-annual dividend of 12 cents a share after reporting third- quarter earnings of 26 cents a share, exceeding the average analyst estimate by 7 percent.

SXC Health Solutions Corp. (SXC CN) gained 2.2 percent to C$17.46. The pharmacy-benefits management company posted third- quarter profit excluding some items of 24 cents a share, exceeding the average analyst estimate by 67 percent. The company also boosted its forecast for full-year earnings.

To contact the reporters on this story: John Kipphoff in Toronto at jkipphoff@bloomberg.net; Whitney Kisling in New York at wkisling@bloomberg.net.

Last Updated: November 6, 2008 17:01 EST