So says Goldman Sachs:

The drop in crude prices has prompted some members of the Organization of Petroleum Exporting Countries to call for a reduction in production levels when the cartel holds an emergency meeting on November 18.
Top exporter Saudi Arabia — OPEC’s most influential member — cut November supplies to one major European refiner, according to a trade source, but told major Asian refiners shipments would not be changed.
Goldman Sachs, a long-standing commodity bull, became a near-term bear on Monday, after conceding that global financial turmoil would take a far bigger toll on demand and that oil prices could hit $50, if the crisis deepened.