The stock markets in the United States declined amid investors' concern regarding the U.S. economy and speculations that Greece will not be able to resolve its debt problems. Sign up for our free newsletter In an interview with Bloomberg, Terry Sandven, chief equity strategist at U.S. Bank Wealth Management said, "There's a sense of uneasiness permeating through the equity market due to first quarter results, mixed signals of economic health and high valuations." Sandven added that the angsts and concerns among investors remain high because the U.S. economy is navigating through a soft patch, and high increase the risk of being wrong. Investors are also concerned regarding the ability of Greece to pay approximately $11 billion of its debt to the International Monetary Fund IMF on May 12. Greece officials assured that their country can make payments to the IMF. Last month, one policy maker suggested that Greece will probably struggle to keep its finances afloat after the end of this month. U.S. economic data Today, the Department of Commerce reported that the U.S. trade deficit increased 43.1% to $51.4 billion in March, the largest gap since October 2008. A separate report from the Institute of Supply Management ISM showed that the non-manufacturing index climbed to 57.8% in April. Investors will pay a close attention to the April jobs report from the Department Labor on Friday. The agency reported that the number of people who applied for unemployment benefits declined 34,000 to 262,000 for the week ended April 26. Kevin Caron, a market strategist and portfolio manager at Stifel Nicolaus & Co., commented, "This is a market that's struggled to get out of the gate this year. There's a lot of choppiness — no clear direction. There's a sense of uncertainty right now, and the market is eventually going to have to look for real growth in the economy, and that's looking fairly weak."