WTI Slumps Under $37 After API Reports Unexpected, Large Inventory Build

Following last week's huge draw, total crude inventories were expected to drop 1 million barrels this week driven by expectations that refinery utilization rose last week. When API reported a hugely surprising 2.3 million barrel build, crude prices, which had drifted off highs after NYMEX close, dropped further as disappointment set in, back under $37.

A majorly unexpected build…