(Reuters) — Microsoft shares jumped 5 percent on Thursday, helping the Nasdaq higher, on renewed investor optimism over personal computer spending and its new Internet browser. The jump made up for a 4 percent dip in the stock on Wednesday, as archrival Apple Inc (AAPL.O) surpassed Microsoft’s market value for the first time since 1989, making the iPhone maker the world’s most valuable tech company.

Read More…