By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- U.S. stock futures indicated a slightly higher open on Wall Street on Tuesday, ahead of inflation and housing data. Prominent earnings reports from Coca-Cola Co. and McDonald's Corp. will come premarket, with Apple Inc. reporting after the closing bell.

Futures for the Dow Jones Industrial Average (DJU4) rose 26 points, or 0.2%, to 17,009, while those for the S&P 500 index (SPU4) picked up 2.90 points, or 0.2%, to 1,969.20. Futures for the Nasdaq 100 index (NDU4) climbed 7.75 points, or 0.2%, to 3,933.50.

Investors are facing a busy day both on the data and the corporate front, with second-quarter results set to come through thick and fast.

The highlight among macroeconomic releases ia the June inflation report, due at 8:30 a.m. Eastern Time. It is forecast to show consumer prices rose 0.3% in June, slower than the 0.4% reported in May. Rising gasoline and food prices likely drove the expected increase in consumer prices, according to economic forecasts.

Later Tuesday morning, the National Association of Realtors will report on existing-home sales at 10 a.m. Eastern Time, and economists expect an annual rate of 5 million for June, compared with a 4.89 million pace in May. The FHFA house-price index is also due in the morning.

A raft of earnings reports should help set the tone for the trading day. Ahead of the bell, Coca-Cola (KO) is expected to report second-quarter earnings of 63 cents per share.

McDonald's (MCD) is forecast to report second-quarter earnings of $1.44 per share, and investors are looking at how it plans to reverse the ongoing decline in U.S. sales.

Also out in premarket hours, Verizon Communications Inc. (VZ), Comcast Corp. (CMCSA) and United Technologies Corp. (UTX) report second-quarter results.

One headline earnings report, however, isn't out until after the closing bell. Apple (AAPL) will release fiscal third-quarter results, and it is forecast to have earned $1.23 a share for the quarter ended in June, which reflects the 7-for-1 stock split that took effect June 9. During the same period a year ago, Apple earned a pre-split $7.47 a share.

Aside from corporate and data news, the conflict between Russia and Ukraine remained in the spotlight. Joao Monteiro, analyst at Valutrades, said in a note that the recent developments in the standoff are seen as generally positive for stocks. Pro-Russia separatists have handed over the black boxes from the downed Malaysia Airlines plane to Malaysian authorities and have agreed to send victims' bodies to the Netherlands.

"Whether this relief rally can actually be sustained in the longer term remains to be seen," Monteiro said.

European Union foreign ministers are gathering in Brussels on Tuesday to discuss further sanctions on Russia following the incident.

U.S. stock markets closed lower on Monday, as investors remained jittery amid escalating violence in the Gaza Strip and the possibility of tougher sanctions on Russia.

In Tuesday's trade, European and Asian equity markets were gaining. Oil futures (CLQ4) continued to rise, while metals prices (GCQ4)were mostly lower. The dollar advanced against most rivals.

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