The last several years have done a number to many people’s nestegg. Many people who relied on their 401k for their approaching retirement were no longer able to retire because their 401k lost so much value in the market due to the credit crisis. If you want to protect your 401k from massive losses, follow these three tips. These tips are designed to protect your assets moreso than growing it. Therefore these tips are meant for those who are going to retire soon(ish). But if you follow these tips, you should also see some good growth in your 401k.