Tax deal drives up interest rates.
Deal
The U.S. central bank's $600 billion stimulus plan was supposed to lower interest rates. But President Barack Obama's tax deal with Republicans, by rekindling fears of budget deficits in the bond market, has pushed them higher.

As the Fed meets this coming week, the surprise shot in the arm from the fiscal authorities might strengthen the case of hawks at the central bank, who think the economy is already growing of its own momentum. They could argue to scale down the $600 billion in bond purchases announced in November.

"The shift to fiscal stimulus implies that officials would be less inclined to extend the current program beyond the second quarter of 2011," said Richard Berner, an economist at Morgan Stanley.

On Wall Street, economists are busy revising up their forecasts for U.S. economic growth in 2011, in part because the tax deal will offer more short-term stimulus than many expected.

The package, which still needs congressional approval, extends the Bush-era income tax cuts, lowers payroll taxes by 2 percentage points and provides additional jobless benefits.

But it is unclear how much these new Wall Street economic projections factor in the renewed deficit fears that drove yields on benchmark 10-year notes to a six-month high last week. That's a question Fed officials will ponder when they meet on Tuesday.

Moody's Investors Service said it is worried the proposed tax reductions could become permanent when many of them come up for review in the presidential election year of 2012, hurting U.S. finances and credit ratings in the long run...