CSG Systems (CSGS) shares soared 14.4% in the last trading session to close at $78.68. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 6.8% gain over the past four weeks.CSG Systems is benefiting from increased profitability driven by SaaS mix shifts, operating efficiencies, and strategic expansions into new industry verticals.This provider of support services for the communications industry is expected to post quarterly earnings ...