By Saumya Vaishampayan 

U.S. stocks advanced Wednesday after reports suggested the European Central Bank was set to deliver a bond-buying program that matched investors' expectations.

A proposal from the European Central Bank's executive board calls for bond purchases of about EUR50 billion ($58 billion) a month that would last for a minimum of one year, The Wall Street Journal reported. The proposal suggests bond purchases could amount to at least EUR600 billion, in line with forecasts that have recently homed in on a figure of around EUR500 billion or higher.

The ECB's executive board met Tuesday to decide on the proposal, which will form the basis of deliberations by the entire 25-member governing council on Thursday, the Journal reported. The news helped stocks erase early losses posted in the wake of weak earnings from International Business Machines Corp.

Also giving stocks a lift was a bounce in energy prices. Crude-oil futures added 3% to $47.88 a barrel. Energy stocks rose the most on the S&P 500, up 1.8%.

The Dow Jones Industrial Average rose 64 points, or 0.4%, to 17579.

The S&P 500 added 13 points, or 0.6%, to 2036 and the Nasdaq Composite Index gained 31 points, or 0.7%, to 4686.

Stocks turned higher because the ECB now appears on track to take action to revive its economy, said Bob Landry, who helps manage about $22.8 billion as a portfolio manager at USAA Investments. "If they didn't go forward with this, that would be looked at pretty negatively in the market," he said.

In the long run, the currency move in the wake of the ECB's Thursday decision will be most important for U.S. stocks, Mr. Landry said.

"If we continue to see the dollar strengthen against the euro, it could continue to act as a headwind to U.S. multinational companies," he said, adding that it could weigh on their earnings.

IBM reported further declines in quarterly profit and revenue, and issued a profit forecast that fell below Wall Street's expectations. Shares fell 2.9%, weighing on the Dow industrials.

Going into the fourth-quarter earnings season, analysts surveyed by FactSet had expected earnings growth of 1.1%, the weakest since the third quarter of 2012. U.S. companies faced dollar strength, a sharp drop in oil prices and weak economic growth abroad during the quarter. Early indications don't look rosy; factoring in 51 companies that have already reported, the S&P 500 is on track to post earnings growth of just 0.36% from a year ago.

"Oil is probably the biggest story," said Bill Stone, chief investment strategist at PNC Wealth Management. "I know that energy earnings are going to be bad. The other side is, do any of the good [effects] of lower oil start showing up?" Mr. Stone noted that Delta Air Lines Inc.'s better-than-expected fourth-quarter results were helped in part by savings on jet fuel.

The Stoxx Europe 600 gave up earlier losses, trading near the flat line.

In economic news, housing starts climbed 4.4% in December from a month earlier to an annual rate of 1.089 million, the Commerce Department said Wednesday. Building permits, an early indicator of construction activity, fell 1.9% to an annual rate of 1.032 million. Economists surveyed by The Wall Street Journal had expected overall housing starts to reach a pace of 1.04 million last month and building permits to hit a rate of 1.06 million. The housing-starts report tends to be volatile and is often revised.

Gold futures fell 0.4% to $1289.70 an ounce. The yield on the 10-year Treasury note fell to 1.787% from 1.806% on Tuesday. Yields fall as prices rise.

Among individual stocks, Netflix shares surged 18%. The company said it added 4.3 million streaming customers as foreign markets grew faster than expected, beating its forecast of 4 million.

UnitedHealth Group Inc. said earnings rose 5.8% in its December quarter, beating expectations. Shares gained 2.8%.

Write to Saumya Vaishampayan at saumya.vaishampayan@wsj.com

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