DEFINITION of 'Price Improvement'
Attaining a higher bid price, if you are selling a stock, or a lower ask price, if you are buying a stock, than the price quoted at the time your order was placed.
BREAKING DOWN 'Price Improvement'
You will often read in brokerage marketing pitches that price improvement is an opportunity and not a guarantee. Although most brokerages purport "fighting for that last 1/16" there is no guarantee of this actually happening.