Since a changing earnings picture is a powerful factor influencing near-term stock price movements, the Zacks rating system is very useful for individual investors. They may find it difficult to make decisions based on rating upgrades by Wall Street analysts, as these are mostly driven by subjective factors that are hard to see and measure in real time. As such, the Zacks rating upgrade for Laureate Education is essentially a positive comment on its earnings outlook that could have a favorable impact on its ...