* WCS for June delivery in Hardisty, Alberta, traded between
$14.90 and $14.75 a barrel under WTI, according to brokerage
CalRock. Last week Canadian heavy crude was trading under $15 a
barrel.
* Monday was the first day of the monthly Canadian crude
trading window, which runs from the first of each month until
the day before export pipeline nominations are due.
* Heavy Canadian crude prices typically tighten in the
summer months as asphalt demand picks up, said one Canadian
crude trader, although there were also signs of slowing Gulf
Coast export demand that could weigh on WCS.
* Global oil prices dropped by a dollar a barrel after weak
economic data from China and expectations of another U.S.
interest rate hike outweighed support from OPEC+ supply cuts
that take effect this month.
* The outright price of WCS was just under $61 a barrel.
(Reporting by Nia Williams; Editing by Christopher Cushing)
