Albert Babayev submits:It appears that Goldman Sachs (GS) has found another way to generate revenue. This time, they won’t be using houses or derivatives to make their cash. They will be using Facebook. As the Social Networking chase continues in the secondary markets, Goldman announced an investment of $500 million into Facebook. That valued Facebook at a cool $50 billion and as a comparable, helps drive up values of other sites like Twitter and LinkedIn. LinkedIn, which got a $20 million boost for a 1% stake back in July from hedge fund Tiger Global Management, has been looking more attractive to investors as the Facebook valuation continues to climb. The July partial stake in LinkedIn valued the company at $2.2 billion ($21.50/share). Currently, investors on SecondMarket.com have an Ask price on the LinkedIn stock at $25/share, or $2.625 billion, which would create a 16% increase in a 6 month period. As LinkedIn continues to introduce new premium channels, my forward estimated price target for LinkedIn is $27.50, which is a 28% increase over its current price. The complete model is below:Complete Story »