Summary: One of the toughest things about investing is knowing when to sell. You buy a great fund and after some years of good performance, it stumbles for several more? Should you sell or hold on?Today's Stocks & Topics: (NES) Nuverra Environmental Solutions Inc., Mortgage, September's Market, The Fed Members, (NGVC) Natural Grocers by Vitamin Cottage Inc., (SNTS) Santarus Inc., (CAT) Caterpillar Inc., (UNG) United States Natural Gas Fund L.P., Reverse Mortgage.
