The Toronto Stock Exchange is up more than 75 points at midday on Tuesday.
The best performers are materials, up 3%, boosted by higher precious metals prices, and energy, up 1.1%.
Info tech and telecoms are the worst performers , down 1.4% and 1.3%, respectively.
In stocks, Mattr (MATR.TO) jumped 23% to $17.11 after it provided preliminary second-quarter results.
Thomson Reuters (TRI.TO) said this morning that it is selling a 51% stake in its Global Print business to investment firm KKR for $500 million. its shares were last seen down 1.8% to C$130.83.