[U.S. Stock Market's Three Major Indexes Open Slightly Higher, Tesla Leads Gains While Apple Declines] The U.S. stock market opened steadily on Tuesday, with all three major indexes posting slight gains. The Dow Jones Industrial Average rose 0.14%, the S&P 500 increased 0.13%, and the Nasdaq climbed 0.18%. On the individual stock front, Tesla (TSLA.O) gained 1.6%, primarily benefiting from an increase in the company's September deliveries in the UK. Occidental Petroleum (OXY.N) rose 1.9%. Apple (AAPL.O) shares fell 1% after Jefferies downgraded its rating. GameStop (GME.N) shares dropped 3% following the company's filing for a mixed shelf offering.