 "Dow ends at record again, S&P posts 7th straight gain")
With the slight advance, US stocks continued last week's rally with the Dow Jones industrial average ending at a record closing high, up 50.22 points, or 0.35%, at 14,447.29. The Standard & Poor's 500 Index rose 5.04 points, or 0.32%, to 1,556.22, just below its record closing high of 1,565.15 reached on October 9, 2007.
Earlier in the session the S&P 500 climbed as high as 1,556.27 - its highest intraday level since October 15, 2007.
The Dow has gained over 10% for the year, while the S&P 500 is up more than 9%.
The Nasdaq Composite Index added 8.51 points, or 0.26%, to close at 3,252.87.
Meanwhile, Wall Street's "fear gauge" closed at its lowest level since February 2007, suggesting investors were not spooked by Monday's brief pullback, despite expectations by many investors that a correction may be looming. The CBOE Volatility Index, known as the VIX, dropped 8.2% to 11.56.
US equities have rallied since the start of the year, helped by signs of improvement in the economy and the support of equities by the Federal Reserve's quantitative easing program. These factors have contained recent pullbacks as investors have used them as a buying opportunity.
"These dips are consistently bought. There is definitely a soft floor for the market," said Peter Kenny, managing director at Knight Capital in Jersey City, New Jersey.
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"It's a QE bid," Kenny said, referring to the Fed's policy of keeping short-term interest rates near zero since late 2008. "Quite frankly, earnings have not disappointed to the point where it is has been disrupted, and there is nothing out there that seems to be getting in the way of this slow but very consistent and methodical drift higher in the market."
But volume was light, with about 5.39 billion shares traded on the New York Stock Exchange, NYSE MKT and Nasdaq, below the daily average of 6.47 billion, suggesting the rally may be losing steam.
Wall Street had traded slightly lower earlier in the day as Italy's credit downgrade and disappointing Chinese economic data gave investors a reason to pause.
Earlier in the session, the Dow reached another lifetime intraday high, rising as high as 14,448.06.
Boeing Co rose to $83.03, its highest level since May 2008, after the US aircraft manufacturer said strong demand was prompting it to increase its production rates of commercial planes. The stock, which rose 2% to $82.94 at the close, was the Dow's biggest percentage gainer. Boeing also gave the biggest boost to the Dow in Monday's session.
The US-listed shares of BlackBerry surged 14.1% to $14.90 after AT&T said it will start selling the company's new BlackBerry Z10 touchscreen smartphone in the United States on March 22.
Dell Inc has agreed to give Carl Icahn a closer look at its books less than a week after the activist investor joined a growing chorus of opposition to founder Michael Dell's plan to take the world's No. 3 personal computer maker private. Dell shares gained 1.5% to $14.37, above the take-private offer price of $13.65.
Genworth Financial Inc shares jumped 6.7% to $10.50 following a report by Barron's that the mortgage insurer's stock could almost double in the next year, boosted by gains in mortgage and healthcare pricing.
In contrast, Dick's Sporting Goods Inc tumbled 10.8% to $45.11 after the retailer reported lower-than-expected fourth-quarter results and gave a disappointing forecast.
Advancing stocks outnumbered declining ones on the NYSE by 1,586 to 1,375, while on the Nasdaq, advancers beat decliners by 1,254 to 1,192.