Currency

A penny, on its face, is worth one cent. But melted down for the copper it contains, it could be worth quite a bit more. So why not mine our piggy banks for metal?

A billion dollars in unwanted American dollar coins sits in specially-made vaults the size of soccer fields in Texas and Baltimore and other undisclosed locations. But why are they just sitting there?

Gold has had a magnificent run during the past 10 years, doubling in value since 2008 alone, and gold mania is seemingly still at full strength. But is profit taking the next move? What if you are among the majority of investors who have yet to dip a toe into the water? Is it safe to dive in?

U.S. consumers already have been hit with higher prices for food and fuel. But the rising prices won't stop there. The weak dollar means that prices for imported goods -- and components -- are headed up, further boosting inflation.

Japan's Nikkei 225 Index advanced 2.7% on Friday, ending a turbulent week at 9,207. In Hong Kong the Hang Seng Index inched up 0.1% to 22,300 and in China the Shanghai Composite Index rose 0.3% to close at 2,907.

The Group of Seven countries on Thursday agreed to intervene to reduce the value of the Japanese yen, which has surged to record levels after last week's earthquake and tsunami. A strong yen could cripple the country's exports and further damage its economy.

One would think that with the Mideast crisis, oil prices skyrocketing and U.S. manufacturing rebounding smartly, the buck would be flying high. But no. Why that's so may lie in international perceptions about where interest rates are heading.

The Japanese automaker's bottom line is likely to have been hit by its many safety recalls, weaker U.S. sales and Japan's rising currency. Analysts forecast Toyota will report a quarterly profit of about $1 billion on sales of $56.2 billion.

After years of exhorting China to increase the value of its yuan, the currency is finally rising. Why that's so is the result of the Fed's quantitative easing program. Here's how Bernanke managed to succeed where political wrangling fell short.

As crude prices keep inching upward, the threat to both the U.S. and global economy is clear. While OPEC says don't blame us, the Interational Energy Agencys says: "This is a wake-up call to the oil-consuming countries and to the oil producers."