All right, take a look at shares of eBay. That stock is tumbling, down by about 9% this morning. It comes after eBay beat uh earnings estimates and revenue estimates.But the company's profit forecast for the current quarter missed expectations. That has investors concerned about shrinking margins ahead ahead of the holiday shopping season. Before today's decline, eBay's stock was up about 61% for the year to date. Uh at this point it looks like it's up by about 44% for the year to date. ...