For much of the year, Rackspace Hosting (RAX) has been one of 2012's big winners . Not this week. On Tuesday, the company reported revenue and earnings that met Street estimates, yet the stock is down nearly 7% over the past two days alone. Have investors forgotten how big a transformation the company is undergoing? A broad-based move to an open source infrastructure based on OpenStack could take profits to new heights in the years ahead. Find out more in the video below.