CF Industries Holdings, Inc.’s (CF) shares hit a fresh 52-week high of $91.06 yesterday, before retracing to close the session at $90.64.CF stock has gained 14.9% over the past three months, outperforming the Zacks Fertilizers industry’s 1.6% rise. It has also topped the S&P 500’s roughly 5.7% rise over the same period.  Image Source: Zacks Investment ResearchLet’s take a look into the factors that are driving CF stock.CF Stock Gains on Healthy Nitrogen Demand, Lower Gas CostsCF Industries is benefiting fro ...