shares of emera inc ema slipped 041 to c5801 thursday in what proved to be an otherwise allaround favorable trading session for the canadian market with the sptsx composite index gsptse rising 054 to 2056449 emera inc closed c722 short of its 52week high c6523 which the company achieved on april 20th trading volume of 855743 shares remained below its 50day average volume of 14 m