Legendary investor, Warren Buffett, claims if he died that he would put 90% of his investment money in a S&P 500 index fund for his wife. A simple investing strategy from the greatest investor of our lifetime. ETF's: Based on the Nasdaq : QQQ – Based of S&P 500 : SPY, VOO – U.S. 20-30 Year Treasury Bond : EDV – Total Stock Market Fund : VTSAX – Total Bond Market Fund : VBTLX – Real Estate Investment Trust (REIT) : VNQ