Nokia Corp. (NOK) is up 4.55% to $8.73 in the early trade, after Goldman Sachs lifted its rating to “buy” from “neutral.” Goldman analysts have reportedly said the company is now in a period of “maximum uncertainty, creating a long-term opportunity for value investors.” The analysts also said that the market was being too pessimistic over Nokia’s recent joint venture with Microsoft Corp. (MSFT), according to news reports citing the analyst move.