Nordstrom stock pops 14% after 2nd-quarter profits come in higher than expected.  Dick’s Sporting Goods posts a good 2nd-quarter report, but does the future of sports retailers belong to businesses that focus on a single sport?  Jason Moser analyzes those stories, as well as Apple’s new credit card. Plus we dip into the Fool Mailbag to offer investing advice for a soon-to-be uncle.  (To get 50% off our Stock Advisor service, go to http://StockIdeas.Fool.com.)