<prompt> Human: Someone asked me about her 401K, shes concerned about the market being inflated. I didnt offer opinions about that, but said that she should move to a MMCash or TBillGov Bond type fund. She was saying that she didnt think that was an option.In all my life, I have never seen any US company that didnt have an option to move to something that was like cash andor bond.Q. Is there some requirement for 401K accounts and what they have to offer for US businesses?Given that the Gov control what qualifies as a 401K, I cant even begin to imagine that a company could NOT offer cashbond type safe account.The company is Sony, which makes me think they should have a great choice because they are a huge company.  <response>: The company does have an ongoing fiduciary responsibility under ERISA the Employee Retirement Income Security Act to select investments prudently for the 401k plan, and to ensure that fees are reasonable.Most employers implement this by offering multiple different asset classes, but there isnt a specific requirement that Im aware of mandating a cashultrashort bond option. 