Staying Close to the Core: Lessons from Studying the Costs of Unrelated Alliances in Spanish Banking

This article analyses whether alliances create shareholders value, and if this value differs depending on the similarity of the partners' businesses, or on the similarity of the partners' businesses with that of the alliance. Using data from 467 equity and non-equity based strategic alliances from 1996–1999 involving at least one listed Spanish bank, we find that, overall, alliances create shareholder value, but that the returns to shareholders are significantly higher when alliance activity is closer to the core business of the banks, than when alliances involve unrelated activities. Although there is no evidence that unrelated strategic alliances destroy value on average, the results obtained show that banks need to assess the benefits and costs of diversification strategies carefully, as their likelihood of success is initially smaller.