*Canada Swings To A Trade Surplus Of C$175 Mln In April

*Initial Jobless Claims Down 3K To 456K

*Canadian New Home Prices Rose 0.3% In April

*Trade Deficit (April) Up 0.6% To $40.3 Billion

U.S. Dollar Drifts Higher Against Most Majors Ahead Of Trade Balance And Jobless Claims Reports