How relevant is nationality in global economic behavior? The aim of this paper is to scrutinize the relevance of nationality affiliations and nationality conceptions in cross-border economic transactions, using the case of foreign investment exchanges. In particular, I examine how nationality affiliations may shape the types of commitments that actors will want to realize through foreign investment transactions, and how nationality categorizations influence the evaluation of potential partners in economic transactions. I also stipulate when nationality affiliations and categorizations play a more- or less-salient role. To develop these propositions I use illustrations from cases of foreign investment attempts in which investors from the West try to acquire firms in post-socialist Slovenia. The analysis is grounded in economic sociology and advances a relational understanding of nationality, seen as interpretive codes embedded in actors’ cultural repertoires, situationally invoked, and made relevant (or not) in interactions.