Should You Just Buy Stocks Until You Die?

1. New analysis suggests retirement savers should avoid bonds entirely. 2. Investors advised to hold one-third in U.S. stocks and two-thirds in international stocks. 3. Current S&P 500 valuations are historically high, posing investment risks. 4. Investing mainly in stocks is risky and requires patience and emotional stability. 5. Past performance does not guarantee future results in stock investing.