Goldman sachs has finally admitted that the past has been bearish on Microsoft's stock was a mistake, and Microsoft's stock rating from "selling" to "neutral", its 12 months target price from $45 to $57.

The largest Wall Street investment Banks 19) entitled "correct mistakes (Righting a Wrong" report, including Microsoft's intelligent cloud business.

Amazon and Microsoft is currently an intense game network storage and service areas, according to Goldman sachs report, investors believe that Microsoft has great odds in the battle.

Goldman sachs analyst Heather Bellini "at that time, we were wrong," said Goldman sachs had failed to recognise the Microsoft stock has not influenced by the original negative ability, and its share price to rise as the growth of the cloud business.

At Goldman, users from offline Office to Office 365, has helped Microsoft fruits have been achieved. In addition, Goldman sachs also praised the Microsoft chief executive, (Satya Nadella) and chief financial officer Amy Hood, according to their work in the process of helping Microsoft turnround played an important role in guiding.

Goldman will Microsoft's price target from $45 to $57. Microsoft's shares closed at $54.13 on Friday.

But $57 in the eyes of some analysts still undervalued. Jackson Square Partners, portfolio manager Chris Bonavico said thanks to its cloud computing service, Microsoft's shares could raise $70 over the next 18 months.

Shares of Microsoft shares rose 17% this year, while the s&p 500 index fell 2.5%.