European equities finished the last trading day of the month sharply lower, as a raft of disappointing earnings dragged stocks deep into the red.
European markets closed mostly higher on Tuesday as investors eyed the volatile trade in commodity markets, ahead of Yellen's speech.
Oversupply and weak demand continue to grip volatile oil markets but several analysts have found a pocket of relative safety.
Energy companies are coming down to the last dollars in their wallets, a CNBC analysis found.
European markets closed mixed Thursday, as investors tried to find their footing amid a busy day for corporate earnings.
It was a bruising day for Europe's energy sector Thursday with the full extent of the pain caused by low oil prices being laid bare.
Bob Dudley has said that low oil prices are not all bad for the energy industry, as subsidies have been cut from petrol products around the world, which has resulted in fairer pricing.
Oil industry leaders have dismissed talk of the price of crude hitting the $20 lows predicted by analysts.
European stocks followed Asian equities lower on Monday on reports that China could stop propping up its equity markets.
Italian energy group Eni said it had discovered potentially one of the world's largest natural-gas fields off the Egyptian coast.
Claudio Descalzi, CEO of Eni, comments on the discovery of the largest known gas field in the Mediterranean.
Oil contractor's shares are Europe's biggest fallers after it slashed its guidance and axed 8,800 jobs as part of a restructuring plan.
Six oil and gas companies have banded together to ask the UN to let them help devise a plan to stop global warming.
Activists in kayaks have protested against plans by Shell to resume oil exploration in the U.S. Arctic. For analysts, the news means Shell's "problem child" is getting some attention.
European equities ended higher as new regulation from the European Commission helped the continent's steel producers post strong gains.
Norway's largest energy company is cutting costs the hard way rather than scaling back production activity, Statoil CEO Eldar Saetre tells CNBC.
Tehran officials are in Beijing this week to seek more oil sales, in a move that could pressure the U.S. to sign off on a sanction-lifting deal.
Oil producers across the country face headwinds, but majors have stressed the sanctity of the dividend, Stewart Glickman tells CNBC.
Several big oil companies are expected to pay more in dividends than they will earn in 2015. Can the stocks really maintain these fat yields?
Egypt's attempt to bring money back to the country has been met with relative success, according to its new political leadership.