The U.S. stock market is moving lower as tensions with Russia escalate.According to AP, Europe markets also fell as Russian troops seized Ukrainian ships and military installations in the Crimean peninsula.The Dow Jones industrial average was down 60 points, or 0.4 percent, to 16,241 as of midday Monday.The Standard & Poor's 500 index fell 13 points, or 0.7 percent, to 1,853. The Nasdaq composite fell 70 points, or 1.7 percent, to 4,206. Health care stocks had some of the biggest losses. Pfizer fell 2 percent.Apple rose 0.8 percent after the Wall Street Journal reported that the company is in talks with cable giant Comcast to offer a streaming video service using Apple set-top boxes.Bond prices rose. The yield on the 10-year Treasury note fell to 2.73 percent.