The government 401k equivalent called the Thrift Savings plan doesn't have a whole lot of current investing options (more are coming next year though) but they have the basic small cap, large cap, international, government, and bond funds.
So there are a lot of services out there that you can pay to get to balance your portfolio to time the market. Many of them are recommending that investors put all of their money in the government securities fund right now due to market volatility. If you're within five years of retirement and are seriously risk averse, ok...maybe. But I want volatile markets, down markets, bad weeks and months if I'm 10+ years out. I can buy more in these environments (especially as we enter correction territory).
People need to invest in their retirement based on their risk tolerance, I do understand that. But putting all your money into government securities in a seesaw market is a loss. All those people who jumped out in 2008 lost massive gains when the market rebounded, not just what they lost, but that plus a whole lot more. For me I might be a little more conservative at all-time market highs, but more aggressive when the market is tanking. I did nothing in 2008 or 2009 but as the market was coming back I moved more aggressively into stocks. #### having all my money on the sideline waiting on the suggestion of a robot, programmed by a human, who can't possibly predict the market at the wheel.