The gains were broad on Thursday, though slight. All 10 industrial groups in the S&P 500 rose, led by energy companies. The Nasdaq composite rose 13.81, or 0.4 percent, to 3,258.93.
MGM Resorts International's stock gained 7 percent after its biggest shareholder, the financier Kirk Kerkorian, requested permission to raise his stake in MGM to a quarter of its shares. MGM owns the Bellagio, Mandalay Bay and other casinos on the Las Vegas Strip.
Analysts say the stock market's surge this year will likely convince more people to move cash into stocks. The Dow is up 11 percent this year, the S&P 500 is up 9.6 percent.
"When the markets are running, you just want to be part of it," Cote said. "Sitting on the sidelines is the wrong move."
So far, retail investors appear unsure. They put money in U.S. stock funds to start the year but have withdrawn it for the last two weeks, according to a report out Wednesday from the Investment Company Institute.
The rally may have pushed the Dow to record highs, but skeptics caution that markets regularly take sudden turns. Exactly one year ago, for instance, the Dow had already raced up 8 percent. But by June, all those gains were gone.
Another note of caution: Former Federal Reserve Chairman Alan Greenspan made his famous "irrational exuberance" comment less than a month after the Dow's 10-day streak in November 1996.
In the Treasury market, the yield on the 10-year note edged up to 2.03 percent from 2.02 percent late Wednesday.
Among other stocks making big moves:
* Coldwater Creek jumped 9 percent after the retailer of women's clothing posted a loss late Wednesday that was smaller than analysts had expected. Its stock rose 28 cents to $3.49.
* Men's Wearhouse soared 19 percent after the clothing company said it would consider selling its K&G unit. The stock jumped $5.55 to $34.62.