Market mayhem, a sector pulse check and Apple gone rotten?

<p>The red-hot tech sector is cooling off, leading today’s sharp move lower for the averages. Our experts break down why there’s a sudden change in market confidence.</p><p>Plus, amid today’s rollercoaster market action, we drill down on what’s happening for Tesla, leisure stocks and the restaurant sector.</p><p>And, Apple is one of the biggest drags on the Dow, on pace for its worst day since mid-March. Is this simply investor profit-taking after completing its stock split, or a sign of trouble ahead? We debate. </p>