BlackBerry Ltd (NASDAQ:BBRY) (TSE:BB) stocks have been on the rise since last week, now over $10 for the first time in months, as expectations over the next generation of handsets, confidence in CEO John Chen’s strategy and a surprisingly strong quarterly earnings report has given investor sentiment a much needed boost. ‘Management has earned another chance’: GMP “We upgrade to a Hold on improved execution and slower than expected declines in subscribers and service margins. We believe management has earned another chance to prove the value of new BlackBerry products and services to its core customers,” writes GMP analyst Deepak…