<prompt> Human: So, I noticed on Personal Capital that my work 401k went from 50k to 35k overnight, on December 27, 2017. My balance statement shows -15k Unrealized GainLoss - what does this mean, is this money gone forever?  <response>: Personal Capital has always messed up my old 401k Fidelity. It always undercounts by a lot on the current day, but counts correctly the next day. Id log in to your 401k provider to be sure but my bet is its Personal Capital. 