FedEx 2001-2002 stock bubble example (IMAGE) Columbia University Caption At the end of 2001, FedEx stock entered a nearly six-and-a-half month bubble, the researchers say. Credit Courtesy of Shihao Yang Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.