let's go to mikey in illinois, mike? >> thanks for taking my call. >> what's up?ing to open a 529 plan for my two-year-old granddaughter. >> excellent. >> i wonder what your opinion is, where i should invest it, the appreciation for the next 15, 20 years. >> let's start by building up the nice position and index fund, i think what you probably want to do, i might even put maybe 35% index fund before you even start thinking of individual stocks, i think it's very conservative time and that's what you want to do, index fund is the way to go for 525 -- vinny in connecticut, vinny. >> thank you for taking my phone call, i am a member. i would like to know by buying into stock and it goes down, what percentage do i think about selling it? >> if we take our thesis and change it, you should sell. if i say i do not like this one i'm trying to hold off for the long-term, i don't think you should be in it then i think you should sell it, that's the guideline, you know there's been a couple of stocks have said that for and that's what i stand by, or when in new york, erwin?