Shopify Expands Buy Button Test With Facebook By: Benzinga via Benzinga June 11, 2015 at 12:56 PM EDT Shopify Inc (NYSE: SHOP) is expanding a test for its merchants of a so-called "buy button" feature on Facebook Inc (NASDAQ: FB), even as ... Read More >> Related Stocks: Bio-Techne Corp Facebook Macy's Nordstrom Shopify Inc