i'm mel lee. tonight on "fast," twitter having its best day since it went public after we broke the news the social giant is in play. will a bidding war ensue? we'll it tell you how to profit. >>> and three days away from the all-important first presidential debate. so what might come for clinton that could spook the markets. >>> and later one of our traders says there is one dow component setting up for next week. >>> we start off with the story of the day. apple shares falling nearly 2% on a report from research firm gfk that raised concerns about sales of the latest iphone 7. and it wasn't just apple. check out the suppliers also tanking in the late afternoon trade. how concerned should we be about this report? do you buy the stock here? brian kelly, what do you say? >> i don't buy the stock here. and but yes, i would be concerned. so last week, when apple was up 12%, we on this show talked about, you know, what's going on with this? is this a real sign? we said you couldn't extrapolate, becaus