In financial markets, the mid-price^[1] is the average price between a seller's ask price of a stock or other commodity and the best buyer bid price of that stock or commodity.

In some cases, the mid-price will be rounded up or down to the nearest "tick" (the nearest valid tradeable price on the exchange system) for convenience purposes, and therefore not be the exact average.

• Bid price
• Ask price
• Bid–offer spread