Investment researchers in retail stocks used to count cars in parking lots with aerial photos, track foot traffic in malls and look for discounts on the racks. Today, they skip all that and buy data on credit- and debit-card transactions to gain an edge ahead of earnings news. Find out the remarkable effect it's having on retail stocks right now. Steve and Sinclair have the Wall Street Journal report. Then estate planning attorney and MBA Richard Dwornik is in the house for the Q & A.