The market's rally - unusual the day before a major report on inflation - was fueled largely by technology and transportation issues.
Experts say the rally is being fueled by liquidity resulting from tax-related stock sales late last year.
"The rally here in the stock market was fueled by domestic funds as opposed to foreign funds."
Many said that yesterday's rally, with the Dow gaining 45.12 points, or 1.4 percent, to 3,373.79, was fueled by upbeat earnings reports and signs of economic strength.
The rally was also fueled by technical factors, including short-covering.
The rally was fueled by short-covering as the weaker-than-expected producer-price data took those investors who had bet on a drop in bond prices by surprise.
The recent rally has been fueled by overseas buying.
The rally this week has been fueled by a growing optimism among investors that the turmoil overseas will not subvert the spectacular bull market.
The rally was fueled by a lift in the bond market and encouraged by two reports indicating that inflation was in check.
The rally was fueled by Tencent's rising profit, which jumped 221 percent through the first three quarters of 2006, to $100 million.