For still other companies, like the oil and gas sector, determining gross margins may be almost impossible. For these giants there are multiple costs for drilling and getting the oil out of the ground, transporting and storing it, and refining it into finished products. That's why so many big oil firms are breaking themselves up into separate companies with single functions. It's simply easier for Wall Street to determine what they do and how much money they'll be able to make, he said. When it comes to gross margins, Cramer concluded, Wall Street wants consistency. Changes in gross margins often lead to changes in stock price.