By Anora Mahmudova and Barbara Kollmeyer, MarketWatch

NEW YORK (MarketWatch) -- U.S. stock futures retreated from session highs after the European Central Bank played down a news story about its plans to embark upon a bond-buying stimulus, plan.

Earlier, a news report suggested the ECB is considering buying corporate bonds on the secondary markets as it attempts to fight deflationary pressures and revitalize the economy.

Upbeat results from Apple Inc. on Monday after the market close were helping futures in early trade.

Extending earlier gains, futures for the Nasdaq-100 index (NDZ4) rose 31.25, or 0.8%, to 3,898. Those for the S&P 500 index (SPZ4) rose 9.7 points, or 0.5%, to 1,909.60, while Dow industrials futures (DJZ4) rose 60 points, or 0.4%, to 16,392.

Shares of Apple Inc. (AAPL) rose 2% in thin premarket trading, after the company reported a 13% rise in profit, boosted by strong demand for its new, bigger-screen iPhones and blowing out Wall Street estimates. Morgan Stanley lifted its price target on Apple to $115 from $110, and analysts at the investment bank said strong iPhone demand and gross margin expansion will help drive upside for shares. Also read: How you could have seen Apple's beat coming

The Nasdaq Composite(RIXF) had a strong session on Monday even before Apple reported, gaining 1.4% and bettering the 0.9% gain for the S&P 500 index (SPX).

ECB cheer, home sales ahead: Along with stock futures, the euro (EURUSD) fell and European stocks rallied on a Reuters report that the ECB may be investing in the corporate bond market. Such a move would beef up its program aimed at driving growth in the continent's struggling economy.

"ECB (reports) and corporate earnings are propelling stocks higher, but I think here in the U.S., basically the market has hit a bottom and earnings are paving the way for a year-end rally which will take us to new records highs," said Peter Cardillo, chief market economist at Rockwell Global Capital, who said he's looking at the S&P 500 to hit 2,075 by year end.

Economists expect existing-home sales crept higher in September to an annual rate of 5.10 million from 5.05 million in August. That data is due at 10 a.m. Eastern. See the daily data preview

Shares of Travelers Cos. (TRV) and United Technologies (UTX) both rose after results.

But McDonald's (MCD) shares fell 1.8% after the fast-food restaurant chain's profit dropped by 30% in the third quarter.

Coca-Cola (KO) shares fell 4.7% after the company's revenue slipped, while it lowered its long-term revenue target and warned it did not expect to meet its earnings view.

Yahoo Inc. (YHOO) will report after the close.

Among other stocks that may see action, Chipotle Mexican Grill Inc. (CMG) warned sales growth may slow, even as it reported stronger-than-expected earnings late Monday. Follow more of the day's big movers here.

China growth slows: The Nikkei 225 index fell 2% on Tuesday, which gave the yen (USDJPY) a boost across the board, while China's Shanghai Composite Index fell 0.7% after data showed China's economy grew in the third quarter at the slowest pace in five years. Europe stocks soared on those ECB reports. and a round of solid earnings.

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