Finally, two other concerns related to the future arise: that of the company's founder holding a majority vote, pushing shareholders into the background in terms of decision-making; and the litigation and regulation risks related to Facebook Inc (NASDAQ:FB)'s control of massive amounts of personal data. LinkedIn: Largest professional network LinkedIn Corp (NYSE:LNKD) is another case of an overvalued stock inflated by exaggerated market expectations. Trading at over 500 times its earnings, more than 18 times the industry average, while offering margins and returns well below its peers' mean figures, I'd recommend holding on this stock for now. My main concerns revolve around a few subjects. For starters, competition is growing very fast and, although LinkedIn remains the largest professional network, other sites like Viadeo seem to offer better prospects in account of their penetration in emerging economies like China.