1341 GMT - If there is a Democratic sweep in the U.S. midterm elections, where the Democrats have a majority in both the House and the Senate, most investors expect bond yields would rise and stocks would fall, according to Bank of America's August global fund manager survey. A total of 37% of fund managers surveyed expressed this view. Another 17% expect bond yields would fall and stocks rise, while 16% expect both bond yields and stocks would fall, the survey says. The survey showed that a majority of 47% of investors surveyed anticipate a split Democratic House and Republican Senate, while expectations for a Democratic sweep fell to 23% from 27%.