Here's a good discussion on the topic... <a href="http://messages.finance.yahoo.com/Business_%26_Finance/Investments/Stocks_%28A_to_Z%29/Stocks_W/threadview?bn=86316&tid=139046&mid=139766" rel="nofollow" target="_blank">http://messages.finance.yahoo.com/Business_%26_Finance/Investments/Stocks_%28A_to_Z%29/Stocks_W/threadview?bn=86316&tid=139046&mid=139766</a>