WASHINGTON (Reuters) - The world's major economies on Thursday pledged to prevent Europe's debt crisis from undermining banks and financial markets, and said the euro zone's rescue fund could be bolstered. Under pressure from investors to show action, finance ministers and central bankers from the Group of 20 economies said they would take all steps needed to calm the global financial system. "We commit to take all necessary actions to preserve the stability of banking systems and financial markets as required," the group, including the United States and China, said in a communique after a dinner meeting on Thursday. http://biz.thestar.com.my/news/story.asp?file=/2011/9/23/business/20110923145852&sec=business