Entrepreneur (blog) | Facebook shares give back some of their big gain USA TODAY Wednesday's gain by Facebook was the stock's best day, on a closing percentage-change basis. It was the best dollar-value gain since June 15, when shares of Facebook added $1.72 apiece. Before Wednesday, Facebook hadn't closed above $20 a share ... Facebook stock jumps 7.7% after Zuckerberg's comments Zuckerberg: No Facebook Phone, Confirms Search Engine 3 Business Lessons from Facebook's Mark Zuckerberg |