They tend to be misunderstood and consequently, some believe, they're under-appreciated investment vehicles.Today's Stocks & Topics: ETFs, Pershing Square Hedge Fund, Investments, LCI - Lannett Co. Inc., CVX - Chevron Corp., Buy & Sell, FCX - Freeport-McMoRan Inc., Cyclical Vs. Non-Cyclical Companies, SFL - Ship Finance International Ltd., AAPL - Apple Inc.