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Should I scale down my 401k?
See if they offer a "Target Date" plan that automatically adjusts throughout your career to balance gains against preserving what you've already built up.  You can adjust for more or less aggressive by selecting a plan with a later or sooner target date, respectively. (But check the administrative fees; higher fees can eat up a surprisingly large part of your growth since they're essentially subtracted from rate of return and thus get compounded.) If they don't have that option, or charge too much for it, then yes, you may want to adjust which plan your money is in over time; you can usually "exchange" between these plans at no cost and with no tax penalty. NOTE: The tax-advantaged 401(k) investments should be considered in the context of all your investments. This is one of the things an independent financial planner can help you with. As with other investment decisions, the best answer for you depends on your risk tolerance and your time horizon.