http://www.thinkexist.com Your Quotations website en-us Copyright ® ThinkExist 1999-2006 info@thinkexist.com Sun, 03 Jan 2010 00:00:00 EST "We found that it is a type of psychological bias on the part of many investors that seems to drive momentum. Investors tend to hold on to their losing stocks too long and sell their winners too quickly. This triggers momentum." http://en.thinkexist.com/quotes/bing_han/