Analysts at Sidoti downgraded Ballard Power Systems Inc. (BLDP) from ‘Buy‘ to ‘Neutral‘ in a research report issued to clients on Thursday. On valuation measures, Ballard Power Systems stock is trading at a P/E to growth and price-to-sales ratio of (666.67) and 5.14, respectively. The t-12-month revenue at Ballard Power Systems Inc. is $70.39 million. […] View the full post at: Notable Downgrades: Ballard Power Systems (BLDP), Nationstar Mortgage (NSM), Abercrombie & Fitch (ANF), Pharmacyclics (PCYC), The TJX Companies (TJX) Related posts: Top Pre-Market Stock Upgrades/Downgrades April 30, 2010 Mortgage Refinance Applications Increase for the week ending February 26, 2010 Caterpillar Inc. Downgraded to “Neutral” at BofA