The May Bubble Map shows crude oil prices continuing on the upward trend from last month. WTI is up $7 since our last post at, $59 per barrel on May 18th. The WTI/Brent differential remains at $7 over WTI. The Alaska North Slope price also stays steady at $3 over WTI. Bakken remains at $12 under WTI, while the Western Canadian Select differential tightens to $9 under WTI.