<prompt> Human: just today, my 401K took a hit of about 853 dollars. I have it split out per the sidebar. I have about 8 in Bond market index fund, 65 in SP 500 Index Fund, and 27 in International Index fund. I realize its the stock market and it fluctuates. But has anyone really taken a big hit like that and should I consider moving it? Am I still in the correct funds? My 401K is through my work. If anyone could help look at this for me I would be eternally grateful. I can provide a list of offered stocks if need be.Thanks in advance!  <response>: 853? lol.Fun tip. One of the Bogleheads unofficial rules of thumb is that you can afford to buy a car as expensive the gainloss in your portfolio on a typical goodbad day. 