Billionaire investor George Soros blames soaring oil prices that reached a record $135 a barrel last week largely on speculation that’s causing a “bubble” in numbers, the Daily Telegraph reports. The weak US dollar, slipping Middle East oil supply, and rising Chinese demand all play a role, but “speculation is increasingly affecting the price," he said, adding that the "bubble" will burst when both the US and UK are in recession. (More oil prices stories.)