Stocks have historically outperformed other assets, with equities delivering 4.9% annual real returns over 200 years. Low-valuation stocks tend to outperform high-valuation ones by 9% annually. However, global GDP growth is slowing, impacting long-term equity returns. Bond investors should be cautious as yields below 3% may lead to negative returns. Gold’s recent run may not be sustainable compared to stocks and bonds.

Read more at Yahoo Finance: Stocks are still king for long-term investing, Deutsche Bank says