canadian stocks were modestly higher in friday midday trading on track to end the week in green territory in the session canadian process industries health services and materials sectors were the outstanding leaders while health technology and energy posted the biggest of the few declines shares of mda ltd was lower after it warned that revenue is expected to be lower in the year due to a number of project delays at midday canadas sptsx composite index was up 053 at 2009875 and the bluechip sptsx 60 rose 051 to 121282 mda ltd shares fell 66 to c849 after it said a slower rampup on two of its large government programs the canadian surface combatant and canadarm3 would affect revenue in the year lowering its target to between 630 million and 650 million canadian dollars the equivalent of us4935 million and us5092 million previous expectations were for revenue to be between c750 million and c800 million shares in northland power inc rose 44 to c4604 after the company said it would upgrade its expectations for the year after strongerthanexpected performance in the second quarter shares in quebecor inc rogers communications inc and shaw communications inc rose after the companies said in a joint statement that they have entered into a definitive agreement for the sale of freedom mobile inc first announced in midjune quebecor shares were up 24 at c2914 shaw shares rose 08 to c3478 and rogers stock was up 11 at c5935