US stocks open higher as tech shares rise, oil and Treasury yields ease

US stocks opened mostly higher on Tuesday, September 29, with the Nasdaq Composite and S&P 500 gaining as technology shares rose and oil prices and Treasury yields eased.The Nasdaq advanced 0.4%, while the S&P 500 added 0.1%. The Dow Jones Industrial Average lagged, falling 32 points, or 0.1%.Tech…