IMF bombshell: The America age to end by 2016 marketwatch: Personal Finance News from Yahoo! Finance

The International Monetary Fund has just dropped a bombshell, and nobody noticed.

For the first time, the international organization has set a date for the moment when the "Age of America" will end and the U.S. economy will be overtaken by that of China.

According to the latest IMF official forecasts, China's economy will surpass that of America in real terms in 2016 — just five years from now.

It provides a painful context for the budget wrangling taking place in Washington right now. It raises enormous questions about what the international security system is going to look like in just a handful of years. And it casts a deepening cloud over both the U.S. dollar and the giant Treasury market, which have been propped up for decades by their privileged status as the liabilities of the world's hegemonic power.

Just 10 years ago, the U.S. economy was three times the size of China's.

Victor Cha, senior adviser on Asian affairs at Washington's Center for Strategic and International Studies, told me China's neighbors in Asia are already waking up to the dangers. "The region is overwhelmingly looking to the U.S. in a way that it hasn't done in the past," he said. "They see the U.S. as a counterweight to China. They also see American hegemony over the last half-century as fairly benign. In China they see the rise of an economic power that is not benevolent, that can be predatory. They don't see it as a benign hegemony."

The rise of China, and the relative decline of America, is the biggest story of our time. You can see its implications everywhere, from shuttered factories in the Midwest to soaring costs of oil and other commodities. Last fall, when I attended a conference in London about agricultural investment, I was struck by the number of people there who told stories about Chinese interests snapping up farmland and foodstuff supplies — from South America to China and elsewhere.

This is the result of decades during which China has successfully pursued economic policies aimed at national expansion and power, while the U.S. has embraced either free trade or, for want of a better term, economic appeasement.

"There are two systems in collision," said Ralph Gomory, research professor at NYU's Stern business school. "They have a state-guided form of capitalism, and we have a much freer former of capitalism." What we have seen, he said, is "a massive shift in capability from the U.S. to China. What we have done is traded jobs for profit. The jobs have moved to China. The capability erodes in the U.S. and grows in China. That's very destructive. That is a big reason why the U.S. is becoming more and more polarized between a small, very rich class and an eroding middle class. The people who get the profits are very different from the people who lost the wages."