(Post) MLK Day Portfolio Update By: TalkMarkets January 19, 2016 at 18:29 PM EST The main reason GSK remains a buy despite the erosion of its price is that its insiders, led by CEO Sir Andrew Witty, are loading up on the stock. Read More >> Related Stocks: Gsk Plc ADR Sociedad Quimica Y Minera DE Chile ADR R Toyota Motor Corp Ltd Ord ADR