The company struggled to IPO but got public in late 2010 with a major valuation haircut (fraction of cash invested) as the only way to feed a very high burn rate supporting its formulation improvement for a generic migraine drug.

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This is a major variable for market valuation.

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To us it appears to us to have the most favorable valuation among the major gold miners, possibly due to the swoon in copper prices.

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Wu, who has a Buy rating on the stock, says he attempted to value the business with a sum-of-the-parts approach, looking at the value of each major part of the business based on the valuation of comparable companies in the public market.

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They sit with major investments like Hilton, bought at twice the EBITDA valuation of comparable properties today.

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For start-ups, LinkedIn not only provides a high valuation benchmark, it also now will be flush with cash and a new major acquirer, Covert said.

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From a valuation perspective Royal Dutch Shell (RDS.A, 68 ) is the cheapest of the major oils.

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