Fundamental analysis is an approach to analyzing markets that focuses on underlying supply and demand factors. It considers things like weather conditions, acreage planted, government programs, and USDA reports to forecast price trends. The most impactful fundamental factors on grain prices are weather, which can significantly affect crop yields, and acreage planted, as supply is directly tied to number of acres. USDA reports also have major influence, especially monthly supply/demand and acreage reports.