Apple (AAPL) down ahead of earnings

Apple Inc. (NASDAQ: AAPL) shares slid 0.5% to $528.86. The company will be in focus after the bell Wednesday as investors look for earnings of $10.19 a share on sales of $43.7 billion in the fiscal second quarter. Share volume was 1.6 million, compared to an all-day average of 10.6 million