By Barbara Kollmeyer, MarketWatch

MADRID (MarketWatch) -- U.S. stock futures held largely to the flat line on Thursday, as investors awaiting the outcome of the European Central Bank meeting.

Shares of Tesla Motors Inc. and Whole Foods Markets Inc. were moving higher after earnings late Wednesday.

Futures for the Dow Jones Industrial Average (DJZ4) fell 3 points to 17,410, while those for the S&P 500 index (SPZ4) fell 2.1 points to 2,016.60. Futures for the Nasdaq-100 index (NDZ4) were flat at 4,142.75.

News that the Republicans retook the Senate helped pushed the S&P 500 (SPX) and Dow industrials (DJI) to fresh closing highs on Wednesday. And while history shows that markets tend to get a boost after the midterm elections, central banks were back in focus for Thursday. Europe stocks were lower ahead of a decision from the European Central Bank, due at 7:45 a.m. Eastern Time.

Need to Know: Gold doesn't stand a chance, but utilities do

ECB in the hot seat: While no new measures are expected, questions on corporate bond purchases are expected to draw attention at a news conference with ECB President Mario Draghi at 8:30 a.m. Eastern.

Richard Perry, market analyst at Hantec Markets, said in a note Thursday that markets will be looking for signs of further easing down the road. "This means if Draghi has had his wings clipped, the market could be disappointed," he said, referring to recent speculation that several of the ECB's governing council members are unhappy with how Draghi has been running the show. Read: ECB discord could 'neuter' Draghi's power

Given growth and inflation are still low, Draghi is "likely to keep the door open to further action," said analysts at Societe Generale in a note.

Ahead of Friday's big jobs report, weekly jobless claims data is due at 8:30 a.m. Eastern Time, along with third-quarter productivity figures and unit labor costs.

Then there are Federal Reserve speakers: Chicago Fed President Charles Evans will give welcoming remarks at 17th Annual International Banking Conference at 10:40 a.m. Eastern. Evans will be a voting member of the Fed policy committee in 2015.

Fed Gov. Jerome Powell will deliver a speech on central clearing of over-the-counter derivatives at the Chicago Fed's International Banking Conference at 1:30 p.m. Eastern. And Cleveland Fed President Loretta Mester, a voting member of the Fed policy committee, will give a speech in New York at 7:15 p.m. Eastern.

Tesla, Whole Foods among stocks to watch: Tesla (TSLA) was up nearly 6% in premarket trade after the electric-car maker's results topped expectations, though it lowered its delivery forecast for 2014.

Whole Foods (WFM) climbed over 8% after the upscale grocer reported a rise in third-quarter earnings and lifted its quarterly dividend.

The Walt Disney Co. (DIS) , Zynga Inc. (ZNGA) are King Digital Entertainment PLC (KING) all report earnings on Thursday.

Apple Inc. (AAPL) could draw attention after Palo Alto Networks Inc. (PANW) said it has discovered a new malware threat that could threaten millions of Apple Inc. devices.

Other markets: The Nikkei 225 fell 0.9%, pulling back after gaining more than 10% in the previous five sessions. The losses came despite a seven-year high for the U.S. dollar (USDJPY) against the yen, which tapped Yen115 before pulling back. Oil(CLZ4) prices were steady, while gold(GCZ4) was slightly lower.

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