How to power your portfolio in uncertain markets By: MarketWatch April 22, 2011 at 06:01 AM EDT A barbell strategy for stocks can buff up a portfolio for periods of slower earnings growth by adding strong, stable companies. Read More >> Related Stocks: 3M Co Abbott Laboratories Apple Chevron Corp Exxon Mobil General Electric Hudson City Bancorp Intel Corp Linear Technology Corp Nordstrom Standard & Poors 500 Target Corp Tiffany & Co VF Corp Wal-Mart Stores, Inc.