NEW YORK -- U.S. stocks declined Friday, with equities paring their best monthly gains since February, as May economic data raised concern over the strength of the economy after a first- quarter contraction.
Transportation companies dropped for the fourth time in five sessions as railroads extended declines, and financial shares fell for a second day. Humana jumped 20 percent after it was said to be exploring a sale. Altera added 4 percent amid reports Intel is near a deal to buy the company for about $15 billion.
The Standard & Poor's 500 index slipped 0.6 percent to 2,107.3. The benchmark posted its first weekly drop in four. The Dow Jones industrial average fell 115.44 points, or 0.6 percent, to 18,010.68, and the Nas
daq composite index lost 0.6 percent. About 7.2 billion shares changed hands on U.S. exchanges, 12 percent above the three- month average.
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"GDP is kind of an old story -- we already knew it contracted, but the Chicago PMI number came in unexpectedly low," said Kevin Caron, a market strategist and portfolio manager who helps oversee $170 billion at Stifel Nicolaus & Co. in Florham Park, New Jersey. "It could be that the market was hoping for a better number, and didn't get the support it wanted. There's conflicting data on the strength of the economy."
A gauge Friday showed Chicago-area manufacturing activity contracted this month to its lowest level since February, raising concerns that the rebound from a weak first quarter lacks vitality. Data earlier also showed gross domestic product in the U.S. shrank, amid harsh winter weather, a strong dollar and delays at ports. A separate report said consumer sentiment in May fell the most since the end of 2012.
"The Chicago PMI headline was exceedingly soft," said Mark Luschini, chief investment strategist in Philadelphia at Janney Capital Management, which oversees about $68 billion. "Investors are chalking up softer economic data to a lot of anomalous factors in the first quarter, but this was a May read. That collectively is weighing on the markets at a time when there's no impetus to buy."
The S&P 500 still advanced 1.1 percent this month, and closed at a fresh record last week. The Nasdaq Composite and the Dow also rose to all-time highs in May. Along with readings on the economy, investors Friday were watching Europe as stocks there declined for a second day on concern Greece won't reach an agreement with creditors in time for a debt repayment.
Economists forecast growth will rebound enough from the first-quarter slowdown for the Federal Reserve to increase interest rates in September. Fed officials are among those who believe the setback in growth will be temporary, helping explain why they are considering raising rates this year.
Fed Bank of St. Louis President James Bullard warned Thursday that keeping rates near zero risks inflating asset-price bubbles, saying officials should raise borrowing costs this year as the economy improves.
The Chicago Board Options Exchange volatility index climbed 4 percent to 13.84. The gauge posted its biggest weekly gain since March.
All of the S&P 500's 10 main groups declined, with industrial and financial companies down the most. Railroads Kansas City Southern, Norfolk Southern and CSX paced a drop among transportation companies for a second day, losing at least 1.8 percent. The Dow Jones Transportation Average fell 0.8 percent, posting its worst month since January.