In a volatile year for the U.S. equity market, one factor has emerged as pivotal in determining whether a stock is likely to rise amid growing concerns over trade policy: how much of that company’s revenue is derived from domestic sources. This distinction has proven to be a key issue for investors trying to determine what stocks will be most impacted by tariffs or other so-called protectionist policies. Some names could be more insulated from the issue. For others, the more global a company’s business, the more vulnerable it could be in this political environment. This factor helps to explain a pronounced divergence in major U.S. stock-market indexes. The Dow Jones Industrial Average DJIA, -0.80% which is comprised almost exclusively of bellwether multinationals, is down 2.4% this week to date. Those losses pulled it back into negative territory for the year, down 0.9%.via