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As a 22-year-old, how risky should I be with my 401(k) investments?
As a 22 year old planning for your financial life, it is obvious to say that saving as much as you can to invest for the long run is the smartest thing to do from a financial point of view.  In general, at this point, aged 22, you can take as much risk as you'll ever will. You're investing for the very long term (+30/+40 years). The downside of risk, the level of uncertainty on returns (positive or negative), is most significant on the short term (<5years). While the upside of risk, assuming you can expect higher returns the more risk you take, are most significant on the long term.  In short: for you're financial life, it's smart to save as much as you can and invest these savings with a lot of risk.  So, what is smart to invest in? The most important rule is to keep your investment costs as low as possible. Risk and returns are strongly related, however investment costs lower the returns, while you keep the risk. Be aware of the investment industry marketing fancy investment products. Most of them leave you with higher costs and lower returns. Research strongly suggests that an lowcost etf portfolio is our best choice. Personally, i disregard this new smart beta hype as a marketing effort from the financial industry. They charge more investment costs (that's a certain) and promise better returns because they are geniuses (hmmm...). No thanks. As suggested in other comments, I would go for an low cost (you shouldn't pay more than 0.2% per year) etf portfolio with a global diversification, with at least 90% in stocks. Actually that is what I've been doing for three years now (I'm 27 years old).