By Anora Mahmudova, MarketWatch

NEW YORK (MarketWatch) -- U.S. stocks extended gains on Tuesday, as better-than-expected earnings from Merck & Co. Inc. and Sprint Corp. outweighed mildly disappointing economic reports.

Consumer confidence dipped slightly in April, coming in below economists' forecasts. Separately, U.S. home-price growth slowed in February for the fourth consecutive month.

The S&P 500 (SPX) was 11 points, or 0.6%, higher at 1,880.59. The benchmark index is about 10 points off its record close. The Dow Jones Industrial Average (DJI) jumped 108 points, or 0.7%, to 16,556.97. The Nasdaq Composite (RIXF) gained 35 points, or 0.9%, to 4,109.71.

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"Overall, earnings have been much higher than expected, beating vastly lowered expectations," said Paul Zemsky, chief investment officer of Multi-Asset Strategies at ING U.S. Investment Management.

"After the selloffs in the momentum stocks, markets are much more balanced now and we are in a place where fundamentals are driving the markets," he added.

In earnings news, Sprint Corp. (S) shares rallied 9.7% after the company posted a smaller-than-expected loss in the first quarter.

Merck & Co. (MRK) rose 3% after it reported higher-than-expected earnings. The company is leading gainer on the Dow Industrials.

Coach Inc. (COH) shares fell 8.8% after the luxury-goods retailer reported weak North American sales.

Shares of Archer Daniels Midland Co. (ADM) dropped 3.5% after the company's first-quarter profit and sales missed analysts' forecasts.

Shares of Amicus Therapeutics Inc. (FOLD) soared 22% to $2.25 after the company announced positive data in a study of a drug to treat patients with Fabry disease.

After the closing bell, Twitter Inc. (TWTR) and eBay Inc. (EBAY) are scheduled to report quarterly results. Twitter shares are sharply higher ahead of earnings, rising 3.9%.

Gogo Inc. (GOGO) shares slid 22% after AT&T Inc. (T)said Monday it would launch in-flight, high-speed Internet service on airlines, competing with the company. The slide triggered the short-sale circuit breaker on the Nasdaq OMX exchange.

In overseas markets, European markets were higher after an easing in geopolitical tensions between Russia and the West. Late Monday, Moscow assured Washington that it won't invade Ukraine, while reports said Russian troops had left the Ukrainian border and returned to their base. Asia markets closed mixed.

In other financial markets, most metals (GCM4) declined, while oil prices (CLM4) advanced.

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