Wall Street Has More Than AI To ThankThe broadening earnings growth that has eluded investors for years may have finally arrived. The S&P 500 is on track to report earnings growth of more than 50% last quarter, the index's fastest growth rate in five years, according to data from FactSet Research. Robust earnings growth has helped the stock market march to record highs. Robust earnings growth has helped the stock market march to record highs. Shares of Berkshire Hathaway (BRK.A, BRK.B) were up more than 2% in recent trading after the conglomerate released its quarterly earnings report over the weekend.