Decentralized Finance (DeFi)

Flash Loan

A loan with no collateral that must be borrowed and repaid within a single blockchain transaction, or the whole thing is cancelled. It lets anyone move huge sums briefly, useful for arbitrage and refinancing, and a tool in many DeFi exploits.

General education, not investment, legal or tax advice. Markets and regulation change quickly: where a definition depends on current law or on a recent event, check the latest coverage before relying on it.