What is a bitcoin halving?

• A bitcoin halving (sometimes called "halvening") occurs when the profit from mining new blocks is halved, meaning miners receive 50% fewer bitcoins for verifying transactions. Bitcoin halvings occur every 210,000 blocks (approximately every four years), and will occur until the network has generated a maximum supply of 21 million bitcoins.
• Bitcoin halvings are important events for investors because they reduce the number of new bitcoins generated by the network. This limits the supply of new coins, so prices could rise if demand remains high. Although this has happened during the months before and after the halvings that have previously taken place (which has precipitated the rapid appreciation of the price of bitcoin), the circumstances in which each halving takes place are different and the demand for bitcoin can fluctuate significantly.
• This list is not exhaustive. Bitcoin halvings will take place every 210,000 blocks until approximately 2140, when all 21 million coins will have been mined.