RBC Global Asset Management says the U.S. dollar’s recent slide could be signalling a broader shift in investor sentiment away from American assets. In a note to clients, the firm points to the 10% decline in the U.S. Dollar Index since January—despite ongoing market volatility and elevated investor anxiety that would typically support the greenback.RBC argues that the scale and timing of the move may reflect doubts over the U.S.’s “exceptionalism” and its traditional safe-haven status. With the dollar still appearing significantly overvalued, the firm sees potential for further weakness ahead. For global investors, this has real implications: the declining dollar has weighed on the relative performance of U.S. stocks and bonds so far this year, especially when measured against international peers on a currency-adjusted basis.----10 year perspective: This article was written by Eamonn Sheridan at www.forexlive.com.