Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

As a 22-year-old, how risky should I be with my 401(k) investments?
At twenty-two, you can have anywhere between 100%-70% of your securities portfolio in equities. It is reasonable to start at 100% and reduce over time.  The one thing that I would mention with that is that your target at retirement should be 70% stocks/30% bonds.  You should NEVER have more than 30% bonds.  Why?  Because a 70/30 mix is both safer than 100% bonds and will give a higher return.  Absent some market timing strategy (which as an amateur investor, you should absolutely avoid) or some complicated balancing scheme, there is never a reason to be at more than 30% bonds.   A 50/50 mix of stocks and bonds or a 100% bonds ratio not only returns less than the 70/30 mix, it is actually riskier.  Why?  Because sometimes bonds fall.  And when they do, stocks generally gain.  And vice versa.  Because of this behavior, the 70/30 mix is less likely to fall than 50% or 100% bonds.   Does that mean that your stock percentage should never drop below 70%?  No.  If your portfolio contains things other than stocks and bonds, it is reasonable for stocks to fall below 70%.  The problem is that when you drop stocks below 70%, you should drop bonds below 30% as well.  So you keep the stock to bond ratio at 7:3.   If you want to get a lower risk than a 70/30 mix, then you should move into cash equivalents.  Cash equivalents are actually safer than stocks and bonds either individually or in combination.  But at twenty-two, you don't really need more safety.   At twenty-two, the first thing to do is to build your emergency fund.  This should be able to handle six months of expenses without income.  I recommend making it equal to six months of your income.  The reason being that it is easy to calculate your income and difficult to be sure of expenses.  Also, you can save six months of income at twenty-two.   Are you going to stay where you are for the next five years?  At twenty-two, the answer is almost certainly no.  But the standard is the five year time frame.  If you want a bigger place or one that is closer to work, then no.  If you stay somewhere at least five years, then it is likely that the advantages to owning rather than renting will outweigh the costs of switching houses.  Less than five years, the reverse is true.  So you should probably rent now.   You can max out your 401k and IRA now.  Doing so even with a conservative strategy will produce big returns by sixty-seven.  And perhaps more importantly, it helps keep your spending down.  The less you do spend, the less you will feel that you need to spend.   Once you fill your emergency fund, start building savings for a house.  I would consider putting them in a Real Estate Investment Trust (REIT).  A REIT will tend to track real estate.  Since you want to buy real estate with the results, this is its own kind of safety.  It fell in value?  Houses are probably cheap.  Houses increasing in price rapidly?  A REIT is probably growing by leaps and bounds.  You do this outside your retirement accounts, as you want to be able to access it without penalty.