fork
A split in a blockchain where the software rules change, creating two separate versions.
A fork occurs when a blockchain’s community changes the underlying code that governs how the system works. Think of it like amending a rulebook mid-game. When miners and developers adopt new rules, the blockchain splits into two paths: the original version and the updated version, each with its own separate ledger of transactions going forward.
Forks happen for different reasons. Sometimes they fix security bugs or add features the community wants. Other times, disagreements about how a blockchain should operate cause groups to intentionally split. When you see “fork” in headlines, it usually signals a major change coming to a cryptocurrency’s rules. This can affect which version coin holders support and which exchanges accept, making it significant news for anyone involved in that blockchain.
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Written once as a plain-English reference, not as advice. Nothing here is a recommendation to buy or sell anything.