The WSJ is reporting on an interesting phenomenon - there is a growing separation between the two major oil indices (Brent and WTI). "The nearly $20 gap is an all-time high, and would have been unthinkable before this year. The two contracts historically have traded within $1 of each other. But a glut of oil at the Nymex contract's delivery point in Cushing, Okla., has weighed on U.S. futures prices, while production problems in the North Sea have boosted Brent's value."