US STOCKS-Wall St turns lower after shooting at Canadian parliament
* Indexes turn lower in afternoon trading
* Fall in crude oil weighs on energy shares
* Investors unnerved by Canadian parliament shooting
* Indexes down: Dow 0.61 pct, S&P 500 0.38 pct, Nasdaq 0.43 pct
By Yasmeen Abutaleb
NEW YORK, Oct 22 (Reuters) - U.S. stocks turned lower in afternoon trading on Wednesday, with major indexes erasing earlier gains as a shooting at the Canadian parliament unnerved investors and Boeing and Biogen sold off following results.
Indexes had traded in positive territory for much of the session, putting the S&P 500 on track for a fifth straight day of gains. Earnings initially drove the move higher, with technology and material shares up on the back of strong results.
Market benchmarks began drifting lower in late morning after a gunman fatally wounded a soldier in Ottawa, the Canadian capital, and then entered the country's parliament buildings chased by police. By early afternoon, the market had given up earlier gains.
The shooting in Ottawa is "the only news event I'm seeing here that could be spooking this market. There's nothing else other than technical points," said Paul Mendelsohn, chief investment strategist at Windham Financial Services in Charlotte, Vermont. Continuación...