Decentralized Finance (DeFi)

Key points

• DeFi, short for decentralized finance, is the set of financial applications that run on blockchains and operate through smart contracts.
• Services such as asset swaps, lending, and liquidity provision work without a custodial intermediary, with rules written directly into public code.
• Stablecoins are the main settlement medium in DeFi, offering stable value within an otherwise volatile asset environment.

What is DeFi?

DeFi is the ecosystem of financial applications built on blockchain networks. Instead of a bank or brokerage intermediating operations, smart contracts execute the rules automatically and transparently. Users interact directly with these contracts from their own wallet, keeping control of their funds.

How it works

DeFi applications are public programs that run on the blockchain. A decentralized exchange protocol, for example, allows converting one asset into another using liquidity pools funded by users. A lending protocol allows depositing collateral and borrowing another asset, with rates set algorithmically according to supply and demand.

Because the code is open, anyone can audit the rules and compose services with one another, plugging one protocol into another like building blocks. This free composability accelerates innovation, but it also widens the risk surface, since a flaw in one contract can affect everything that depends on it.

Every operation requires payment of a network fee to be processed, and the outcome depends on liquidity conditions at the moment of execution.

Why it matters

For a desk that needs to convert between stablecoins or access liquidity outside banking hours, DeFi offers an always-available, programmable infrastructure. It is also where a large share of stablecoin liquidity circulates, which makes it relevant for payment corridors that use these assets as a settlement layer. Even so, access requires technical familiarity and attention to risk, which is why many operators combine DeFi with regulated services at the local-currency on-ramp and off-ramp steps.

Risks and limitations

The main risk is smart contract failure: a code error can be exploited and drain funds, with no support desk to reverse it. This is compounded by the risk of low liquidity, sharp price swings, and poorly audited or abandoned projects. Since there is no responsible intermediary, losses usually fall entirely on the user, which calls for extra caution.