Microsoft's shares rose after a Wall Street analyst claimed the company had an extremely good fourth quarter.

Microsoft has yet to announce its own figures, but JP Morgan Securities analysts have increased their predictions for Microsoft's 2008 profit estimates. JP Morgan analyst Adam Holt was optimistic about the company's organic growth prospects.

Office 2007 will continue to be a strong performer for Microsoft, and he thinks the company's core business' margins will remain stable while margins for its entertainment and devices unit and online services segment will get better over time.