Heavily-shorted A123 Systems (AONE +9.6%) adds to Friday's gains after announcing it's expanding its electric grid storage product line. A123's grid storage deals (I, II) have been a bright spot for a company whose electric car battery ops have been hit by disappointing sales and recalls.
ETF Screener: Search and filter by asset class, strategy, theme, performance, yield, and much more
ETF Performance: View ETF performance across key asset classes and investing themes
ETF Investing Guide: Learn how to build and manage a well-diversified, low cost ETF portfolio
ETF Selector: An explanation of how to select and use ETFs