This appears to be a hack, or data corruption.<p>See NASDAQ's official listing ( <a href="http://www.nasdaq.com/symbol/amzn/after-hours" rel="nofollow">http://www.nasdaq.com/symbol/amzn/after-hours</a> ). Several other ticker symbols (AAPL, MSFT, etc.) are also affected.<p>Edit: It appears several tech stocks (AAPL, MSFT, AMZN, etc.) have their prices set to 123.47. Definitely pointing to some sort of data corruption.