Stock index futures were pointing towards a lackluster start, with June Dow Jones futures and S&P June futures both flat, and Nasdaq futures down 0.1 percent.

"The slowdown in earnings has been expected for some time, but it's the relative beating of expectations that has allowed this market to rise to new highs. The reality is interest rates are still quite low," said Christian Holland, fund manager at Cavendish Asset Management.

"With the market at these highs, people are wondering whether we're going to get a choppy summer and a big old-fashioned crash in October. But to my mind, it looks pretty much OK."

The Dow Jones industrial average finished Friday up 0.1 percent at a record 13,120.94, its 37th record finish since the beginning of last October, when it first crossed the 12,000 threshold.

Hilton Hotels , Kellogg , Verizon , Loews , WM Wrigley , RadioShack and Pitney Bowes were among S&P500 companies set to report earnings on Monday.

First-quarter earnings for S&P 500 companies were now projected to rise 7.4 percent, up from a growth rate of 5.3 percent the previous week, Reuters said in its weekly compilation of S&P 500 forecasts from Wall Street strategists and industry analysts.

On the economic front, March personal income and consumption data was due for release at 1230 GMT, with the National Association of Purchasing Management-Chicago reporting on Midwest business conditions for April at 1345 GMT.

Elsewhere, Yahoo said it would pay around $680 million for the Right Media stake in a move to boost the reach of its advertising to social network sites. Yahoo took a 20 percent stake last October in the privately held firm.

Delta Air Lines Inc. said it emerged from bankruptcy after a 19-month restructuring that resulted in $3 billion in annual financial improvements.

PMI Group could slide after saying on Monday it expects total incurred losses for its U.S. mortgage insurance operations to be between $300 million and $360 million in 2007.

Shares of cell phone distributor Brightpoint Inc. were likely to be in the spotlight after an article in Barron's April 30 edition said the stock could rise 50 percent if the company's business grows faster than the overall market.

The publication also said investor Carl Icahn's American Real Estate Partners LP is overvalued, with shares worth only $65, significantly below their current value of $108.51.

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