Even if data next week shows a mediocre rebound in U.S. economic growth, that might be enough to keep the stock market aloft at record highs and the Federal Reserve steadfast in its winding down of stimulus through bond purchases. Growth had shrunk 2.9 percent in the first quarter due to a harsh winter and spending cuts tied to the federal Affordable Care Act. Indeed, Friday’s disappointing report on durable goods orders in June spurred JPMorgan and Goldman Sachs to shave their second-quarter outlook by 0.1 percentage point to 2.6 percent and 3.0 percent growth, respectively.