This paper provides an in-depth analysis of investor-state contracts, focusing on the critical role of contractual clauses in safeguarding international investments. The paper begins with an introduction to investor-state contracts, highlighting their significance in the context of increasing international trade and economic liberalization. It then delves into the two primary types of clauses: stabilization and umbrella clauses. Stabilization clauses, including freezing, economic stabilizing, and hybrid clauses, are examined for their function in protecting investors from adverse changes in a host state's laws. The paper further dissects the rationale behind the transformation of a breach of Investor-State Contract to a breach of an international treaty and clarifies the interaction between Investor-State Contracts and international law. Umbrella clauses are discussed as a means to enforce a state's private undertakings, transforming disputes into international matters. The paper underscores the importance of these clauses in providing legal certainty for cross-border transactions and protecting investors from the manipulation of host states. The analysis provides a comprehensive overview of the contractual mechanisms used to mitigate risks and ensure the stability of international investments.