The 11th annual Great Investors Best Ideas (GIBI) Dallas Investment Symposium just took place where managers shared investment ideas to benefit The Michael J. Fox Foundation for Parkinson's Research and Vickery Meadow Youth Development Foundation. Below are some brief notes on the event: Notes From GIBI Dallas Conference 2017 David Einhorn, Greenlight Capital Still owns a huge position in General Motors (GM) but has been trimming it since it's grown too large (risk management, position sizing, etc). Still his largest position by a longshot though.