By Aneet Chachra, CFA
On January 2, Apple (AAPL) announced its Q4 results would be weaker than expected. Trading in Apple shares was halted at 4:30 p.m. New York time (well after the official 4 p.m. market close), the press release came out and shares resumed trading at 4:50 p.m. Large asset managers rarely trade after hours. But a few investors quickly evaluated this new information, and the price of Apple stock immediately reset about 8% lower. Four million shares traded that night, only around 0.1% of Apple's outstanding shares. But this was enough to