HOT STREAK: The Standard & Poor’s 500 ended the week higher, just. The index rose 1.9 points, or 0.1 percent, in the week, extending its streak of advances to seven weeks.
‘‘TOTAL DISASTER’’: Wal-Mart’s stock slumped 2.1 percent, dragging down the Dow, after Bloomberg News quoted a leaked e-mail from a company executive that said February sales were a ‘‘total disaster.’’
CLASH OF THE TITANS: Herbalife rose after billionaire investor Carl Icahn disclosed in a regulatory filing that he had bought a 13 percent stake in the company. Icahn’s nemesis, hedge fund manager Bill Ackman, has described the company as a pyramid scheme and bet the stock would fall.