The strength of European leaders' pledge to assist Greece is without precedent, but investors are uneasy about the absence of a concrete plan on how the EU would help the nation. The EU's heads of state promised "determined and coordinated action" to prevent the financial collapse of Greece. Many said they could not provide details because Greece has not asked for help. "We have made a clear political statement," said German Chancellor Angela Merkel. "... Greece is a part of the European Union and won't be left on its own, but there are rules and these rules need to be adhered to."