Best Buy's stock has risen a cool 13% in 2014, handily outpacing shares of fellow big box retailers Walmart and Target. The stock has also trumped the gain for the Dow of about 8%. Although Best Buy has garnered some love on Wall Street for reinventing its sales floor to include interesting products in the TV and connected home categories, there may be another explanation for the stock's ascent. Rabid online sale growth, fueled by a new ship-from-store program. So far this year, Best Buy's online sales have risen 24.3%, almost two times the rate achieved at this point in 2013. TheStreet's Brian Sozzi reports.