Apple stock sinks below $500 after Citigroup downgrade December 17, 2012 7:14 AM Devindra Hardawar Devindra Hardawar LinkedIn Twitter Facebook Google Plus Profile Recent Stories: How cognitive science and user empathy powered Google’s design breakthrough Googlers use Hangouts video chats 20,000 times a day internally Pebble raises $15M, launches SDK update for better smartwatch apps With good news comes bad news.