The top-performing stock among automakers in the U.S. this quarter is General Motors.
The company, which endured management upheaval during the quarter and announced that it would lose substantial cash in Europe, saw its shares rise almost 18 percent from July through late September. The gain was the best since the first quarter of this year, when the stock climbed about 23 percent. GM posted strong profits in that period. GM stock has outperformed all other major automakers in the U.S. Only Nissan Motor Co.’s U.S. shares came anywhere close to GM’s stock appreciation. They were up almost 11 percent.