MarketWatch | Oil set to add to streak of weekly losses MarketWatch Oil fell upwards of 5% each of the past two weeks, and futures have dropped a further 3% so far this week, hitting seven-month lows. More declines could be in the offing depending on weekly U.S. drilling-rig data due later Friday from Baker Hughes. OPEC Took Aim at US Oil Producers, but Hurt Itself, Too Why Oil May Plunge to $30 a Barrel Oil slides as US petrol supplies surge |