Definition: In this task, you are given a text of the article. Your task is to generate a headline (title) for this article.
Input: borrowing costs for europe 's more vulnerable countries rose on wednesday while stocks and the euro fell , as the possibility of a new credit downgrade for portugal underscored fears that efforts to contain the debt crisis to greece were failing .

wall st. stumbles as european debt worries persist bettina wassener and graham bowley contributed reporting