U.S. stocks opened lower Monday as investment bank Morgan Stanley (MS) reports an ugly profit miss. Its quarterly earnings fell well short of analysts expectations as investors fled the bond, currency and commodity markets amid uncertainty about the timing of a U.S. interest rate hike and concerns about China's slowing economy. Halliburton (HAL), not surprisingly, reported numbers that were well below last year. The oil field services company said it had a loss of $54 million versus a profit of $1.2 billion a year ago. IBM (IBM) is another big report due out after the closing bell today and Wall Street will be watching to see if the company can improve on its revenue. Investors will also look at how well its doing with its cloud business.