U.S. stock benchmarks mostly rose Thursday morning, holding gains after a weaker-than-expected reading on second-quarter gross domestic product and other economic data, as investors await the trading debut of online brokerage Robinhood Markets /zigman2/quotes/228268942/composite HOOD -0.21% . The Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA -2.53% rose 188 points, or 0.5%, at 35,019, touching an intraday record high at 35,155.18; the S&P 500 index /zigman2/quotes/210599714/realtime SPX -2.27% gained 19 points, or 0.4%, at 4,419, while the Nasdaq Composite Index /zigman2/quotes/210598365/realtime COMP -2.23% traded flat to slightly higher at around 14,789. Brokerage firm Robinhood makes its long-awaited debut after pricing its initial public offering at the low end of expectations. In economic reports, the Commerce Department said U.S. gross domestic product grew at an annualized pace of 6.5% in the second quarter, coming in below forecasts for an expansion of 8.5%. Separately, data from the Labor Department showed first-time applications for unemployment benefits fell 24,000 last week to 400,000. The economic data come after the Federal Reserve held its policy in check and signalled that it hopes to scale back its crisis-era policies when the labor market and economy shows sustained improvement from COVID-19. Chairman Jerome Powell said that the economic recovery may not be there yet, however.