MarketWatchOpinion: Why $40 oil is here to stayMarketWatchLAGUNA BEACH, Calif. (Project Syndicate) — Oil prices have been heading south again, with a barrel of U.S. crude CLU5, +0.69% recently falling below $42 — the lowest level since March 2009, the nadi …

Business InsiderGrowth data hit European stocks as oil drops to 6 year lowsBusiness InsiderOIL LOW: The price of crude oil hit its lowest level in 6½ years Friday amid concerns over a slowing economy in China, a huge energy consumer, and strong global prod …

CNNMoneyIran is hiding more oil at sea than we realizedCNNMoneyThat's a key question because Iran's nuclear deal with the West could lift crippling sanctions, and pave the way for tons of Iranian oil to hit the market. A surge in Iranian exports wo …