Why IBM Stock Soared Higher on Friday

International Business Machines (IBM 2.78%) has notably lagged behind its more glamorous peers in the tech sector. That wasn't necessarily the case on Friday with its stock, as the shares rushed to close nearly 3% higher. This was more than double the 1.2% rate the S&P 500 index rose on the day. A researcher's upgrade was the key reason for the pronounced upward move.Evercore ISI raises IBM to the equivalent of buyThe IBM upgrader was a team of Evercore ISI analysts led by Amit Daryanani, which changed thei ...