CF Industries Holdings, Inc.’s (CF) shares have popped 15% over the past month. The company has also outperformed the Zacks Fertilizers industry’s 11.8% rise over the same time frame. CF has also topped the S&P 500’s roughly 10.5% increase over the same period.Let’s take a look into the factors that are driving this fertilizer maker. Image Source: Zacks Investment ResearchCF Stock Gains on Healthy Nitrogen Demand, Higher PricesCF Industries benefits from the rising global demand for nitrogen fertilizers, wh ...