US stocks are trading at record levels with earnings season right around the corner, and improving expectations for Corporate America’s profit growth indicate that the rally can keep going. Among the companies in the S&P 500 Index that provided guidance for their third-quarter results, more than 22% were expecting to beat analysts’ expectations — the highest reading in a year, according to data compiled by Bloomberg Intelligence. In addition, the share of firms issuing worse-than-expected profit forecasts ...