Oil

Under pressure to take action on rising gasoline prices, President Barack Obama wants Congress to strengthen federal supervision of oil markets, increase penalties for market manipulation and empower regulators to increase the amount of money energy traders are required to put behind their transactions.

Feeling the earth move under one's feet can be unsettling, even in places where it's a natural and fairly common occurrence. But far more disconcerting is when major tremors in places unaccustomed to earthquakes can be traced to human causes like fracking.

It's a question that echoes across the Internet, on blogs and message boards, and in the content of a specialty wiki called Brickipedia: "Why are Legos so expensive?" Our search for an answer starts in Denmark, and ends in the playrooms of countless children around the world.

Concerns about the European financial crisis are still dragging down the price of oil. Benchmark crude for July delivery fell 32 cents to $92.69 per barrel in Monday midday trading. All eyes remain on Greece, which is trying to implement tough new austerity measures necessary to keep international aid coming.

The theme for Thursday is big players adjusting to a changing world: Citigroup is shutting down a major hedge fund it used for soon-to-be-banned proprietary trading, Goldman has been subpoenaed over its role in the subprime mortgage crisis, and OPEC is thinking that it might need to pump more oil.

It feels like the price of a case of beer is higher than it has been since the Babylonians first started fermenting barley 6,000 years ago. But what's behind the rising prices? Turns out, the explanation requires a tour across the economic landscape -- and around the world.

Signs that Europe's debt troubles are larger than previously thought upended financial markets Friday, sending the dollar up nearly 1% and erasing the week's stock gains. Fears of a deepening financial crisis overshadowed reports that consumers are feeling more confident in the U.S. economy and that inflation remains in check.

Not long ago, everyone knew gas was sure to reach $4 a gallon for regular on a nationwide basis soon. Now, though, that sure thing is looking iffy: Gas prices are wavering, and a number of factors at home and abroad are about to come together to push demand -- and prices -- lower.

Investing is prone to manias and panics. Investors get excited as prices rise, and end up buying today what they should have bought years ago. The recent commodities sell-off reminded me of the rule I follow for commodities investing. Had you followed it, you'd have saved loads of money in 2008 and 2009 and made tons recently.

As the price of oil has soared over the past few months, an army of commentators has accused "speculators" of manipulating the oil market to profit from the misery of the American people. But how much are these big investors to blame for our pain at the pump, and how much is simply a matter of supply and demand?