US inventories is not the only thing that matters. Even if the US inventories are low, you have to remember that US is not lifting enough oil from persian gulf or from WAF. They have their own home grown concoction called shale which is in abundance. Crude is going down on lack of demand which can be attributed to slowing economies world over. Conspiracy theorists will also say that the OPEC is deliberately keeping supply intact to counter US shale producers. Whatever the case is, crude is in a super duper bear grip. Expected bottom is 30 USD as per many analysts. Untill then at least every bounce of a percent or two is a sell.
Looks like there were two reference points
"Market analysts' expected a crude-stock rise of 1.1 million, while the American Petroleum Institute late Tuesday reported a decline of 7.3 million barrels."
Actual decline of 5.5 mn was less than the second data of 7.3 mn, may be that's why. But whom to believe in future .....