<p>The S&P 500 index opened at a record high on Tuesday, lifted by shares of mega-cap technology firms, while Beijing's regulatory crackdown hammered shares of several US-listed Chinese firms.</p>.<p>The Dow Jones Industrial Average rose 3.8 points, or 0.01 per cent, at the open to 34,790.16. The S&P 500 rose 4.1 points, or 0.09 per cent, at the open to a record high of 4,356.46, while the Nasdaq Composite rose 22.2 points, or 0.15 per cent, to 14661.548 at the opening bell. </p>
<p>The S&P 500 index opened at a record high on Tuesday, lifted by shares of mega-cap technology firms, while Beijing's regulatory crackdown hammered shares of several US-listed Chinese firms.</p>.<p>The Dow Jones Industrial Average rose 3.8 points, or 0.01 per cent, at the open to 34,790.16. The S&P 500 rose 4.1 points, or 0.09 per cent, at the open to a record high of 4,356.46, while the Nasdaq Composite rose 22.2 points, or 0.15 per cent, to 14661.548 at the opening bell. </p>