"Investors were hoping for more substance on sovereign bond purchases, but Draghi hasn't given investors anything that is really new," John Smith, senior fund manager at Brown Shipley in Manchester, England, told Reuters.
Several policy makers from Germany, the euro-zone's largest economy, have made clear they do not favour bond purchases to help stoke euro-zone inflation.
"It's now patently clear that ... Draghi lacks the crucial German support for launching full-blown quantitative easing," Nicolas Spiro of Spiro Sovereign Strategy told Reuters.
After markets closed in Europe though, Bloomberg reported that the ECB would be considering a broad-based asset purchase plan at its January 22 meeting.
Wall Street was mixed in a narrow range. In afternoon trading in New York, the Dow Jones Industrial Average eked out a 0.03 per cent advance, while the Nasdaq Composite Index crept 0.09 per cent higher. The Standard & Poor's 500 Index slipped 0.05 per cent.
Earlier in the session, the Dow touched a record high 17,937.96, while the S&P 500 climbed to a record 2,077.34.
A Labor Department report showed initial claims for state unemployment benefits declined by 17,000 to a seasonally adjusted 297,000 for the week ended November 29. A report on Friday is expected to show nonfarm payrolls rose by 230,000 last month after rising by 214,000 in October, according to a Reuters survey of economists.
"Overall the picture of labour is one of ongoing payroll gains and gradually firming wage growth," Gregory Daco, lead US economist at Oxford Economics USA in New York, told Bloomberg News.
Shares of Microsoft gained, last up 1.9 per cent for the biggest percentage gain in the Dow, after Barnes & Noble agreed to buy back the company's stake in its Nook business.