Key Takeaways CSTL shares climbed 77.9% since an October upgrade, far outperforming the S&P 500 over the same period.HG gained 19.8% after its recommendation was raised to Outperform in mid-October.MNST advanced 15.5% over 12 weeks as part of Zacks' Earnings Certain Admiral Portfolio.Last week, major U.S. indexes ended the Christmas-shortened week higher, with the S&P 500 and the Dow attaining new record highs. The S&P 500, the Dow Jones Industrial Average and the tech-heavy Nasdaq Composite gained 0.75%, 0 ...