According to Bank of America Merrill Lynch, US stocks this year are at risk of ending their outperformance trend over global stocks.<br />The S&P 500 is a benchmark of US stocks. It has outperformed the MSCI All-Country World Index through most of the post-financial-crisis era. But Stephen Suttmeier, a BAML technical analyst, said in a note on Sunday, "the index "still shows signs of a 2-year+ top relative to MSCI ACWI. <br />
