Slumping Treasury Bond Prices Send Stocks Lower

While Wall Street has been rallying for most of the past three months on those early signs of recovery, it has also been vulnerable to unexpected turns such as the jump in Treasury yields.

"Stocks are following bonds," said John Brady, senior vice president of global interest rate products at MF Global. "Will the economy grow and expand vigorously in the face of sustained higher interest rates?"

The Dow lost ground for the fifth time in six days, falling 173.47, or 2.1 percent, to 8,300.02 after rising 196 points on Tuesday. The Standard & Poor's 500 index fell 17.27, or 1.9 percent, to 893.06, and the technology-laden Nasdaq composite index fell 19.35, or 1.1 percent, to 1,731.08.

On Tuesday, stocks soared after an upbeat reading on consumer confidence lifted hopes for an economic rebound later this year.

The Dow is still 26.8 percent above the lows it reached in early March, but 41.4 percent below the record high it hit in October 2007.

The drop in bond prices Wednesday followed a well-received auction of $35 billion in five-year notes and a day ahead of an auction of $26 billion in 7-year notes. All told, the government plans to turn out $101 billion in debt this week.