LNKD continues our theme of hot stocks that have overshot their fair valuations. So far this year, LNKD is up 110% while the S&P 500 (SPY) is only up 15%. LNKD is a high-momentum stock in a popular sector, so investors are turning a blind eye to its competitive weaknesses and high valuation. Most people are aware that LNKD is expensive compared to its current earnings, but few people seem to aware of its off-balance sheet liabilities and the alarming level of profit growth implied by its stock price.