Definition
The ask price is the lowest displayed price at which a seller is currently offering to sell an instrument in a quoted market.
In market context
A buyer normally looks to the ask side of a two-sided quote, while a seller looks to the bid side. The difference between them is the bid-ask spread, which can widen when liquidity falls or volatility rises. A displayed ask is not an execution guarantee because available size may be limited, other orders may trade first, and the market can change before an order reaches the venue.
Source
Use the primary source for fuller regulatory or market context.
