Quote of note:

Nouriel Roubini, an economics professor at New York University's Stern School of Business, estimates that if China cut its rate of accumulation by half, long-term interest rates in the United States could rise by 200 basis points over a few months and the value of the dollar would fall.

The Perfect Storm That Could Drown the Economy
By DANIEL GROSS

WE seem to be living in apocalyptic times. On NBC's "Revelations," Bill Pullman and Natascha McElhone seek signs of the End of Days. In the Senate, gray-haired eminences speak of the "nuclear option."

The doomsday theme is seeping into the normally circumspect world of economics. In April, Arjun Murti, a veteran analyst at the investment bank Goldman Sachs, warned that oil could "super-spike" to $105 a barrel. And increasingly, economists are prophesying that the American economy as a whole may be sailing into choppy waters.

Just look at the many obvious and worrisome portents. The government each year spends much more than it brings in, and so the nation has a large budget deficit ($412 billion in fiscal 2004, and growing). Americans also import far more goods than they export, and so the nation has record trade and current account deficits.

As consumers, Americans personally spend significantly more than they earn. Worse, some imbalances are eerily reminiscent of conditions that helped touch off recent economic crises: Mexico in 1994, Asia in 1997, Russia in 1998 and Argentina in 2002. Throw in rising interest rates, warnings of a housing bubble and the potential for higher inflation and slower growth (a k a stagflation) - and you can understand why some economic analysts may be plumbing the New Testament for inspiration.

...The United States finances its spendthrift ways by selling dollars and dollar-denominated securities (like Treasury bills) to foreign creditors, mostly to central banks in Asia. To sustain growth, the United States needs foreign creditors to continue to add to their piles every day.

Any signs to the contrary are worrisome. In February, when the Korean government suggested that the Bank of Korea might diversify its foreign exchange holdings, "this seemingly innocuous statement set off a small panic in our stocks and bond markets," said James Grant, editor of Grant's Interest Rate Observer.

If the Bank of China, which has been accumulating dollars at the rate of $200 billion a year, decides to cut back on new purchases, either to diversify or to let its currency appreciate, the United States would quickly have to offer sharply higher interest rates to retain existing investors and entice new ones. Nouriel Roubini, an economics professor at New York University's Stern School of Business, estimates that if China cut its rate of accumulation by half, long-term interest rates in the United States could rise by 200 basis points over a few months and the value of the dollar would fall.

Such a rising tide - the yield on the 10-year bond shooting from 4.25 to 6.25, the average 30-year mortgage rising from 6 percent to 8 percent - would mean instantly higher borrowing costs for the government, businesses and consumers. It would drench Wall Street, soaking the stocks of giant interest-rate-sensitive blue chips like Citigroup and making life difficult for speculative, debt-ridden companies. Some highly leveraged hedge funds or investment banks caught on the wrong side of trades would incur significant losses.