By Caroline Valetkevitch
NEW YORK (Reuters) - U.S. stocks rose on Thursday, boosted by gains in shares of materials companies, including iron ore producer Cliffs Natural Resources Inc
Cliffs jumped 20.6 percent to $21.97 after it posted earnings late on Wednesday that were much better than analysts had estimated. The S&P 500 materials index was up 1.4 percent.
Telecommuncations companies also rose following gains in Verizon Communications Inc
Companies reporting results in the past 24 hours lifted the growth forecast for S&P 500 companies quarterly earnings to 3.6 percent. At the start of the reporting period the forecast was growth of just 1.5 percent.
Investors have closely watched earnings to see if they would be enough to extend the market's uptrend that began at the start of the year, especially since recent economic data has suggested slowing growth in March and early April. Worries about global weakness have also hung over the market.
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"Basic materials companies around the globe were worried about potential slowdown in China, and now it looks like those stocks have risen," Alan Lancz, president of Alan B. Lancz & Associates Inc., an investment advisory firm in Toledo, Ohio.
Thursday's U.S. data supported an upbeat view of the economy, however. Initial claims for state unemployment benefits in the latest week dropped a surprising 16,000 to a seasonally adjusted 339,000 versus expectations for 351,000.
The Dow Jones industrial average was up 78.16 points, or 0.53 percent, at 14,754.46. The Standard & Poor's 500 Index was up 11.02 points, or 0.70 percent, at 1,589.81. The Nasdaq Composite Index was up 28.70 points, or 0.88 percent, at 3,298.35.
United Parcel Service Inc
Akamai Technologies Inc
But Exxon Mobil Corp and 3M Co bucked the trend as their shares fell.
Exxon
Fellow Dow component 3M Co
(Editing by Bernadette Baum and Kenneth Barry)