http://finance.yahoo.com/q/bc?t=1y&s=RE ... C&c=%5EDJI
hope this isn't off topic for this board. above link is to a simple chart showing 2 CPAP companies vs. the S&P500, Nasdaq and Dow30. some investing opportunity in this business. (disclaimer--I sleep with a RMD S8 and own RMD in a diversified portfolio).