By Anora Mahmudova and Barbara Kollmeyer, MarketWatch

NEW YORK (MarketWatch) -- The U.S. stock market was stalled at record levels on Thursday, as investors assessed the European Central Bank president Mario Draghi's dovish comments after the bank left the key interest rate unchanged.

ECB President Mario Draghi reiterated that ECB policy makers are unanimously committed to using unconventional measures if needed to maintain price stability. In other words, the ECB could use outright QE, if deemed necessary.

Read: Recap: ECB's Draghi says risks to eurozone economy skewed to downside

The S&P 500 (SPX), the Dow Jones Industrial Average (DJI) and the Nasdaq Composite (RIXF) were little changed and switched between small gains and losses.

Better-than-expected jobless claims data as well as productivity report aided sentiment.

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

In economic news, the number of Americans applying for new jobless benefits lingered below 300,000 for the eighth straight week amid the lowest level of layoffs in years. U.S. productivity in the third quarter grew at a 2% annual pace, preliminary data show, marking the fourth sizable increase in the past five quarters.

Federal Reserve speakers on the schedule to speak on Thursday: 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 after the electric-car maker's results topped expectations, though it lowered its delivery forecast for 2014.

Whole Foods (WFM) climbed 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:Europe stocks remained lower after the European Central Bank left rates unchanged.

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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