Investors were giddy after Tesla reported third-quarter earnings late last week. On Thursday, they bid up the stock by 22 percent; it closed at $260.48. They tacked on an additional $8.71, or 3.34 percent, on Friday, when the stock closed at $269.19.Investors, including Elon Musk, cheered that auto profit margins came in above the previous year’s level and significantly above the previous quarter’s. “This will give bulls hope that Tesla passed the nadir on numbers,” conceded analysts at..