A bone spur (osteophyte) is a bony growth formed on normal bone. Most people think of something sharp when they think of a spur, but a bone spur is just extra bone. It's usually smooth, but it can cause wear and tear or pain if it presses or rubs on other bones or soft tissues such as ligaments, tendons, or nerves in the body.
An immediate or cancel order (IOC) is an order to buy or sell a security that must be executed immediately, and any portion of the order that cannot be immediately filled is cancelled.
Fill or kill orders are not the same as immediate-or-cancel orders, which permit at least partial fulfillment of an order. Why It Matters Kills occur most often when a person wants to trade a large quantity of stock at a particular price or at a particular time and does not want to trigger the significant price change that often occurs when placing traditional market or limit orders for a large number of shares.