"It's less about the recent economic data and more where we are today, and it's more about looking forward to monetary policy changing as well," Stephen Massocca, chief investment officer at Wedbush Equity Management in San Francisco, told Reuters.
In afternoon trading on Wall Street, the Dow Jones Industrial Average fell 0.49 per cent, the Standard & Poor's 500 Index slid 0.44 per cent, while the Nasdaq Composite Index fell 0.22 per cent.
Slides in shares of Caterpillar and those of Walt Disney, last down 1.8 per cent and 1.2 per cent respectively, led the decline in the Dow. Alcoa was 4.3 per cent lower.
Even so, Wall Street is trading near record highs. And the biggest source of fresh cash in American equities is companies buying their own stock, by a 6-to-1 margin, Bloomberg reported, citing to data compiled by S&P Dow Jones Indices. Chief executive officers, who just announced the biggest round of monthly repurchases ever, executed about US$550 billion of buybacks last year.
In Europe, all eyes are on Thursday's euro-zone central bank meeting. The European Central Bank will announce further details about its plans to bolster the region's sagging economy and inflation with additional bond purchases.
In Europe, the Stoxx 600 Index ended the session with an 0.8 per cent gain from the previous close. The UK's FTSE 100 Index rose 0.4 per cent, while both France's CAC 40 Index and Germany's DAX climbed 1 per cent.
The euro, however, last traded 0.9 per cent lower at US$1.1077, after earlier in the day touching the lowest level in 11 years.
"There have been some mixed signs from the European data, but the ECB's commencement of its [quantitative easing] program is still very much the focus of markets," Keith Bowman, an equity analyst at Hargreaves Lansdown in London, told Bloomberg. "I'm still optimistic on European equities. With the QE program in the background, that does provide significant support."