
HOME ALL STOCKS MUTUAL FUNDS ETFs WIND SOLAR GEOTHERMAL BIOFUEL BATTERY ENERGY EFFICIENCY SMART GRID POWER PRODUCTION ENVIRONMENTAL MARKETS CLEANTECH NEWS ADVERTISE CONTACT ABOUT Ten Clean Energy Stocks for 2010 Main Pure Play Energy Storage Stocks Year-End Review And Outlook John Petersen With only a couple trading days left in 2009, this is as good a time as any for a performance review . The predictions I made at this time last year were pretty solid with an 80 accuracy rate on price direction . For the year , a 1,000 investment in each of my green star companies would have yielded a portfolio appreciation of 67 which handily beat the broader market indices . That being said , my star and caution ratings were a good deal less prescient because I seriously underestimated the potential of both Maxwell Technologies MXWL and Active Power ACPW which appreciated by over 200 The following table identifies my current universe of pure play energy storage companies , reiterates my outlook at the beginning of this year , summarizes their performance during 2009 and offers my assessment of likely price performance during 2010. In the table , a single star signifies a neutral . position