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Decentralized finance

Decentralized finance (commonly referred to as DeFi) is an experimental form of finance that does not rely on central financial intermediaries such as brokerages, exchanges, or banks to offer traditional financial instruments, and instead utilizes smart contracts on blockchains, the most common being Ethereum. DeFi platforms allow people to lend or borrow funds from others, speculate on price movements on a range of assets using derivatives, trade cryptocurrencies, insure against risks, and earn interest in savings-like accounts.

Synthetix Synthetix is the backbone for derivatives trading in DeFi, allowing anyone, anywhere to gain on-chain exposure to a vast range of assets.
Balancer Balancer a non-custodial portfolio manager, liquidity provider and price sensor.
Aave Aave is an open source and non-custodial liquidity protocol for earning interest on deposits and borrowing assets.
Curve Curve is an exchange liquidity pool on Ethereum designed for extremely efficient stablecoin trading low risk, supplemental fee income for liquidity providers, without an opportunity cost.
KeeperDAO KeeperDAO provides an efficient mechanism for large scale arbitrage and liquidation trades on all DeFi protocols.