Bitcoin, decentralized finance, and frontier markets: A controlled analysis of portfolio diversification (2020–2026)

Abstract

This study analyzes the relationship between Bitcoin returns, the decentralized finance (DeFi) sector, and traditional stock market returns, focusing on the Iraq Stock Exchange (ISX) from January 4, 2020, to March 4, 2026. Growing institutional adoption has strengthened the interconnectedness of digital assets with traditional markets, while the International Monetary Fund (IMF, 2021) warns that this integration may expose frontier economies to new financial risks (Gross & Senner, 2026). Using the autoregressive distributed lag (ARDL) methodology, the results reveal a statistically significant negative short-run impact of Bitcoin returns on ISX returns, with no significant long-run impact for either Bitcoin or DeFi. This suggests cryptocurrencies have acted as alternative assets and liquidity competitors rather than safe havens or hedging tools in the traditional sense, and that Bitcoin may serve as an indicator of global risk trends given its reach into relatively isolated frontier markets like Iraq. In contrast, the lack of DeFi impact is attributed to the novelty of these assets, insufficient investor awareness, limited digital infrastructure, and scarce access to centralized trading platforms in frontier markets.