* Boeing falls after 737 MAX electrical grounding issue * U.S. private payrolls increase solidly in April - ADP * Energy, materials lead sectoral gains on S&P 500 * Indexes up: Dow 0.46%, S&P 0.54%, Nasdaq 0.63% (Adds comments, updates prices to early afternoon) May 5 (Reuters) - Wall Street’s main indexes and the Dow hit a record high on Wednesday, as growth stocks bounced from a steep selloff in the previous session and a survey showed private jobs rose in April. Technology-related companies including Apple Inc, Microsoft Corp, Amazon.com Inc, Facebook Inc and Alphabet Inc rose between 0.1% and 1.7%. The S&P 500 technology sector gained 0.9%, while the Philadelphia SE Semiconductor index added 1.8%. “With stock indexes at or near record highs and coming off a massive rally in the past year, there’s a counterintuitive reaction function to the positive earnings reports to sell the news,” Art Hogan, chief market strategist at National Securities in New York, wrote in a client note. “We would continue to recommend a diversified equity allocation with a barbell approach that has growth exposure on one end, and economically sensitive cyclical exposure on the other end.” Six of the 11 major S&P 500 sectors rose in early afternoon trading, with commodity-sensitive sectors including energy and materials rising 3.5% and 1.3%, respectively. Defensive utilities fell 2.2% and real estate dropped 1.3%, leading sectoral declines. The ADP National Employment Report showed U.S. private payrolls increased in April as companies rushed to boost production amid a surge in demand, powered by massive government aid and rising vaccinations against COVID-19. A more comprehensive reading in the form of the Labor Department’s non-farm payrolls data is due on Friday. Strong economic data and earnings pushed the S&P 500 and Nasdaq indexes to record high last week, but markets have wobbled amid concerns about rising inflation and potentially higher U.S. interest rates. “Once you have markets hitting the highs we have seen recently, the one thing investors are worried about is rising inflation and what that means for profitability of companies,” said Shawn Cruz, senior market strategist at TD Ameritrade. At 12:10 p.m. ET, the Dow Jones Industrial Average was up 155.88 points, or 0.46%, at 34,288.91, the S&P 500 was up 22.33 points, or 0.54%, at 4,186.99 and the Nasdaq Composite was up 85.27 points, or 0.63%, at 13,718.77. Boeing Co fell 1.6% after U.S. air safety officials asked it to supply fresh analysis and documentation showing 737 MAX subsystems would not be affected by electrical grounding issues. T-Mobile US Inc jumped 4.7% as it raised its full-year postpaid subscriber net additions forecast. Uber Technologies Inc is set to report earnings after markets close on Wednesday. Advancing issues outnumbered decliners by a 1.58-to-1 ratio on the NYSE and by a 1.29-to-1 ratio on the Nasdaq. The S&P index recorded 97 new 52-week highs and no new low, while the Nasdaq recorded 101 new highs and 40 new lows. (Reporting by Shreyashi Sanyal and Sruthi Shankar in Bengaluru; Editing by Shounak Dasgupta and Arun Koyyur) Our Standards: The Thomson Reuters Trust Principles.