The next leap in the evolution of ETF investing: a two-pronged strategy for succeeding in both bull and bear marketsETF expert Stephen McKee introduces his Comet System a proven system for selecting and timing the market to take full advantage of mutual funds and ETFs.Stephen McKee is president of Investment Selections & Timing, Inc., and he publishes No-Load Mutual Fund Selections & Timing newsletter; he has been interviewed as an expert on the subject by Forbes, Barron s, The Hulbert Financial Digest, and Timer Digest