Bitcoin's most predictable market event isn't a Fed meeting or a court ruling. It's a line of code. Roughly every four years, the reward for mining a new block gets sliced in half — a pre-programmed supply squeeze known as the halving. It's been happening since the network launched, and it's not stopping anytime soon.
How it works
The halving is triggered by block height, not a calendar date. After every 210,000 blocks — typically a bit under four years — the subsidy miners receive for adding a block drops by 50%. That means fewer new bitcoins enter circulation each day. The supply curve flattens. The scarcity ratchets up.
Halvings are baked into Bitcoin's design as a deflationary mechanism. Miners earn less per block, but if demand holds, the price adjusts. The event also affects miner profitability and hardware turnover. Older, less efficient rigs get squeezed. Hashrate sometimes dips, then recovers as newer gear comes online.
What's different this time
The current cycle is the fourth halving period. The network has matured. Institutional players hold big positions. The macroeconomic backdrop — interest rates, inflation, global liquidity — is different from any previous halving year. But the code is the same. The next halving is still several years away, and the countdown is already ticking in every block.
