<prompt> Human: It just occurred to me that if I invest in a target retirement fund, lets say 2060 or something, it seems reasonable to assume that many people will withdraw money in 2060.This being the case, I am wondering if I should worry about the fund losing value right when people decide to withdraw money from it, because everybody is trying to withdraw money from it at the same time.  <response>: Its value is based on securities the fund holds. Not special 2060 versions of them. 