Wall Street reached another milestone yesterday as the Dow Jones industrial average closed at a record high. Stocks rose as Brexit fears eased, and Japan signaled more economic stimulus.A day earlier, the broader Standard & Poor's 500 had also reached a record-high closing. So the Dow Jones industrial average climbed 121 points, or 0.7 percent, to 18,348.The Standard & Poor's 500 index added 15 points, or 0.7 percent, to 2,152. And the Nasdaq composite rose 34 points, or 0.7 percent, to 5,023.