Definition
A shared digital record, copied across many computers, where new entries are added in linked blocks that are very hard to change afterward.
The story
Instead of one bank keeping the official ledger, thousands of computers keep matching copies and agree on each new batch of transactions. That's what lets cryptocurrencies work without a central authority.
Why markets watch it
Companies and financial firms are experimenting with blockchains for payments and settlement beyond crypto.
Connects to
We explain why it moves markets. What you do with it is your call. Commentary and education only. Not financial advice. All terms