US stocks : Dow up 0.5 pct
rose 2.2 percent to $77.95, a closing high. DuPont's shares gained 1.8 percent to $47.82. Verizon's stock rose 0.9 percent to $42.94.
Thomson Reuters data through Tuesday morning showed that of the 74 S&P 500 companies that have reported earnings so far, 62.2 percent have topped expectations, roughly even with the 62 percent average since 1994, but below the 65 percent average over the past four quarters.
Overall, S&P 500 fourth-quarter earnings are forecast to have risen 2.6 percent. That estimate is above the 1.9 percent forecast from the start of earnings season, but well below the 9.9 percent fourth-quarter earnings forecast from Oct. 1, the data showed.
U.S.-listed shares of Research in Motion rallied 13 percent to $17.90 a day after its chief executive said the Canadian company may consider strategic alliances with other companies after the launch of devices powered by RIM's new BlackBerry 10 operating system.
About 6.2 billion shares changed hands on the New York Stock Exchange, the Nasdaq and NYSE MKT, below last year's daily average of about 6.45 billion shares.
On the NYSE, advancers outnumbered decliners by a ratio of roughly 9 to 4. On the Nasdaq, five stocks rose for every three that fell.
Signs of improved sentiment toward world growth were also seen in European bond markets. The yield on Portugal's benchmark 10-year note fell below 6 percent for the first time since late 2010 on news that the country was set to tap the bond market this week for the first time since it was
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