April 23 released a commercial survey shows that the major economies in North America, Europe and Asia have lost some growth momentum in April 2013. This trend may be caused by the central bank to step up measures to boost the sluggish global economy. As the world's two largest export trading nation, China and Germany in April and not the past. April HSBC China purchasing managers' index (PMI) fell to a two-month low of 50.5, barely able to maintain in the ups and downs of the top of the watershed, the March PMI final value of 51.6. The data shows once again that China's economic recovery is weak. Just released by German manufacturing purchasing managers index fell to 47.9 from 49.0, the lowest for four months, the output index fell to 47.9 from 50.0, also hit its lowest level in four months. The U.S. manufacturing sector into the most sluggish growth in the past six months since the moment. Data provider Markit recently released preliminary data show that the United States in April Markit manufacturing purchasing managers index (PMI) fell to 52.0, the lowest since October 2012, less than expected 54.0,3 month-end value of 54.6. The IMF 2013 global economic growth by the tone of the expected 3.5% in January to 3.3 percent, and the growth rate in 2014 forecast from 4.1% to 4.0%. IMF also claimed that the central bank can do more efforts to stimulate global economic growth.