<prompt> Human: lets say the SP 500 index falls 20 this year and you have a sizable amount of capital waiting on the sidelines for just this kind of thing. Would you recommend simply putting that money to work in a low cost fund that mirrors the SP 500 or take some chances on a few single stocks? say GOOG, BAC and JNJ are a couple that would be interesting to look at. Any other approaches to really get maximum value out of a correction?  <response>: Everyone here will recommend index funds and not attempting to time the market. 