'WTI crude oil futures collapse to negative price for first time in history'  Insane &amp; must carry through to June &amp; beyond.  No way this is a one off. Oil sands &amp; shale are in deep trouble.  #oil #oilsands #cnrl #exxon $CNQ $PXD $XOM #saudi #russia  https://t.co/B6l2tJkR31