 Shares of Biomerica Inc. BMRA, 7.58 shot up 13.1 toward a 6-month high in active morning trading Friday, after the medical diagnostic products company said Walmart Inc. WMT, 0.45 will start selling its Aware Breast Self Exam device in about half its stores. Trading volume ballooned to 1.8 million shares, compared with the full-day average of about 57,200 shares. 