The Nasdaq Composite Index (INDEXNASDAQ:.IXIC) traded mostly flat as investors continued to worry over the early trickle of fourth-quarter earnings reports. Apple (NASDAQ:AAPL) led the tech gainers in Thursday mid-market trading; investor confidence is high on reports that CEO Tim Cook’s visit to China may well lead to China Mobile (NYSE:CHL) the world’s largest mobile service provider offering the iPhone to its customers.   The Nasdaq fell 2.76% on trading volume of 407 588 752 as of 12:05 p.m. EST.   Apple rose just 0.46% to $519.50 on the aforementioned news from China despite rampant speculation (and derision) about ...