Stocks opened lower Monday as Apple (AAPL) slipped on hints of weak demand for its iPhone 5, putting pressure on its broad chain of component suppliers. The Nasdaq fell 0.5%, the S&P 500 0.3% and the Dow Jones industrial average 0.2%. Volume surged 32% on the Nasdaq, and was down 9% on the NYSE compared with the same time Friday. Ixia (XXIA) popped 8% out of the opening gate before pulling back, punching to a new high in heavy trade. The maker of