The job market is improving, corporations are making record profits and the housing market is recovering.
"People are overreacting a little bit," said Gene Goldman, head of research at Cetera Financial Group. "It goes back to the fundamentals, the economy is improving."
The Dow's drop Thursday â¿¿ which knocked the average down 2.3 percent to 14,758.32 â¿¿ was its biggest since November 2011. It comes just three weeks after the blue-chip index reached an all-time high of 15,409. The index has lost 560 points in the past two days, wiping out its gains from May and June
The Standard & Poor's 500 lost 40.74 points, or 2.5 percent, to 1,588.19. It also reached a record high last month, peaking at 1,669. The Nasdaq composite fell 78.57 points, or 2.3 percent, to 3,364.63.
Small-company stocks fell more than the rest of the market Thursday, a sign that investors are aggressively reducing risk. The Russell 2000 index, which includes such stocks, slumped 25.98 points, or 2.6 percent, to 960.52. The index closed at a record high of 999.99 points Tuesday.
The yield on the 10-year Treasury note rose to 2.42 percent, from 2.35 percent Wednesday. The yield, which rises as the price of the note falls, surged 0.16 percentage point Wednesday after the Fed's comments. As recently as May 3, it was 1.63 percent.
A Fed policy statement and comments from Chairman Ben Bernanke started the selling in stocks and bonds Wednesday.
Bernanke said that the Fed expects to scale back its massive bond-buying program later this year and end it entirely by mid-2014 if the economy continues to improve.
The bank has been buying $85 billion a month in Treasury and mortgage bonds, a program that has made borrowing cheap for consumers and business. It has also helped boost the stock market.