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This study aims to analyze the comparison of equity-based financing decisions and sukuk from the perspective of Sharia principles in companies in Indonesia. The development of the Islamic capital market in Indonesia shows a significant increase in the use of financing instruments that comply with Islamic principles, thereby encouraging companies to consider funding alternatives that are not only financially efficient but also Sharia-compliant. In the framework of Sharia financial management, capital structure decisions must consider the prohibition of usury, the principle of risk sharing, fairness in risk distribution, and contract certainty. This research uses a qualitative approach with a literature study method thru the analysis of various scientific journals, regulations, and academic sources related to capital structure theory, the concept of Sharia equity, and the characteristics of corporate sukuk in Indonesia. The study results indicate that equity-based financing provides flexibility in capital structure and reflects a risk-sharing mechanism, but it has the potential to cause ownership dilution. Meanwhile, sukuk offers asset-based financing with a clear contractual structure and does not dilute company ownership, although it requires an underlying asset and a more complex issuance process. Comparatively, both instruments have Sharia legitimacy as long as they meet the screening requirements and contract structures applicable in Indonesia. This research emphasizes that corporate financing decisions in Indonesia need to consider the balance between financial efficiency and compliance with Sharia principles.

The rapid development of Islamic finance has encouraged central banks in dual banking systems to design monetary instruments that comply with Sharia principles while maintaining macroeconomic stability. However, the effectiveness of Islamic monetary instruments and their transmission mechanisms remain widely debated in the literature. This study aims to systematically review the empirical and conceptual literature on Islamic monetary instruments, focusing on their effectiveness, transmission channels, and macroeconomic outcomes. Using a Systematic Literature Review (SLR) approach guided by the PRISMA framework, this research synthesizes findings from major studies examining Islamic monetary policy operations, banking transmission mechanisms, and their impacts on inflation, output, and financial stability. The results reveal that the financing/credit channel and the interest–profit pass-through mechanism are the dominant transmission pathways in dual banking systems. Although Islamic banks often demonstrate relative stability during monetary shocks, policy transmission remains partly influenced by conventional interest rate benchmarks due to institutional and market structure factors. The effectiveness of Islamic monetary instruments is largely determined by the depth of Islamic money markets, the availability of liquid instruments such as central bank sukuk, and the strength of regulatory and institutional infrastructure. Furthermore, empirical evidence linking Islamic monetary instruments directly to macroeconomic outcomes such as inflation and growth remains limited. This study proposes an integrated conceptual framework linking Islamic monetary instruments, transmission channels, and macroeconomic outcomes, moderated by institutional quality, market share of Islamic banking, and market depth. The findings contribute to the literature by providing a comprehensive synthesis of existing research and offering policy insights for strengthening Islamic monetary policy frameworks in dual financial systems.