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Decentralized Finance (DeFi) ecosystem showing architecture, mechanisms, use cases, and systemic risks Executive Summary Decentralized Finance (DeFi) represents a structural reconfiguration of how financial systems can be designed, governed, and operated in a digitally native environment. Rather than relying on centralized intermediaries such as banks, clearing houses, or custodial institutions, DeFi proposes a framework where financial logic is embedded directly into software protocols and executed on distributed networks. These protocols aim to provide financial services—such as trading, lending, settlement, and asset issuance—through transparent, programmable, and permissionless systems. At its core, DeFi is not a collection of tokens or speculative instruments. It is an architectural shift in financial infrastructure. The defining characteristic of DeFi is that trust is minimized through cryptographic verification and deterministic execution, rather than outsourced to centralized...

Conceptual diagram showing decentralized financial data flow Executive Summary Modern blockchain systems are designed to be deterministic and self-contained. While this design provides strong guarantees around security and verifiability, it also introduces a fundamental limitation: blockchains cannot access real-world information on their own. Financial applications built on blockchains—such as decentralized exchanges, derivatives platforms, and lending protocols—require external market data to function correctly. This dependency gives rise to what is commonly known as the oracle problem . Decentralized oracle networks attempt to solve this problem by acting as data bridges between off-chain information sources and on-chain smart contracts. represents one approach to this challenge, with a specific focus on delivering financial market data to blockchain environments. Rather than relying primarily on secondary data aggregation, Pyth is designed to source data directly from financial ...