Stocks were down at midday Monday ahead of a speech by Federal Reserve Chairman Ben Bernanke. The Nasdaq fell 0.5%, the S&P 500 lost 0.3% and the Dow Jones industrial average was down a fraction. Volume was 15% higher on the Nasdaq and 9% lower on the NYSE compared with the same time Friday. Apple (AAPL) slumped 3% in more than double its average daily volume on reports that it has cut orders for iPhone 5 components due to weakening demand. The