SXY pumps low sulphur Brent oil, page-2

Here’s one under-reported factor that may explain Russian and Saudi Arabian willingness to turn their backs on almost 18 months of Opec oil supply cuts – the spread between Brent crude and West Texas Intermediate has reached its widest level in three years: The simple reason for this is that the shale oil boom has left crude sloshing around the U.S., resulting in a local oversupply. While Brent prices have risen some 14 percent over the past three months, WTI is up just 7.5 percent and Midland crude – the version of WTI priced in the booming Permian basin rather than the benchmark delivery point in Cushing, Oklahoma -- is down 4.8 percent.
https://www.bloomberg.com/view/articles/2018-05-28/opec-and-russia-best-not-poke-the-shale-oil-bear