** Energy pipeline co's U.S.-listed shares of fall as much as 4.6 pct to $43.15, stock's biggest intraday pct loss in nearly 8 months
** Canadian shares down 4.4 pct
** Reports quarterly loss partly due to after-tax goodwill impairment charge related to its U.S. Northeast Power business.
** Says will sell power business and do bought deal common share offering to help fund acquisition of Columbia Pipeline Group Inc announced earlier this year
** Up to Tuesday's close, Transcanada's U.S. stock had gained 34 percent YTD