Drawing upon theoretical studies on the policy impact of political parties, this article address cross-national differences in financial policy choice and capital market development in Malaysia and Thailand. An explanatory approach that considers inter-party organisational dimensions in tandem with intra-party structural attributes shows that financial and regulatory policies have varied significantly between Malaysia and Thailand in response to the national configurations of political parties. The different patterns of policy choices, in turn, have led to varied capital market structures and development trajectories. Thus the theoretical literature on the political economy of financial capitalism in developed countries, which stresses the importance of domestic political institutions, has implications for the political underpinnings of financial market reforms in emerging market countries.