THE FED SURPRISES!

The Federal Reserve unexpectedly refrained from reducing the $85 billion pace of monthly bond buying, saying it needs to see more evidence of improvement in the economy.

“The Committee decided to await more evidence that progress will be sustained before adjusting the pace of its purchases,” the Federal Open Market Committee said today at the conclusion of a two-day meeting in Washington. While “downside risks” to the outlook have diminished, “the tightening of financial conditions observed in recent months, if sustained, could slow the pace of improvement.”

Chairman Ben S. Bernanke and his policy making colleagues refrained from paring record accommodation as rising borrowing costs show signs of slowing the four-year expansion. Treasury yields have jumped since May, when Bernanke first outlined a possible timetable for a reduction in the asset purchases that have swelled the Fed’s balance sheet to $3.66 trillion.

The Fed chairman has orchestrated the most aggressive easing in the Fed’s 100-year history, pumping up the balance sheet from $869 billion in August 2007 and holding the main interest rate close to zero since December 2008.

“Asset purchases are not on a preset course, and the committee’s decisions about their pace will remain contingent on the committee’s economic outlook as well as its assessment of the likely efficacy and costs of such purchases.”