Cramer suggested Kostin's "buyback aristocrats" tend to outperform when the economy slows. He pointed to two of his favorites on this list that have been buying back 4% of their share count annually — Wells Fargo and Apple. He indicated that both companies' generous buybacks demonstrate management's confidence. He also used the iPhone maker's "buyback aristocrat" status as another reason he believes investors should own the stock for the long term. "You need fortitude to buy stocks and stick with them," Cramer said. "Apple's buyback helps that fortitude."