By Chris Prentice and Carolyn Cohn WASHINGTON/LONDON (Reuters) -Wall Street shares gained on Monday and European stocks rose following five straight weeks of declines, as European bond yields rose on speculation of monetary tightening. Markets are on alert for rate rises in both the euro zone and the United States after the ECB last week was considered to have adopted a more hawkish tone. The United States reported stronger-than-expected jobs and earnings data. European Central Bank President Christine Lagarde on Monday calmed some of those jitters, saying there were no signs that measurable m…