™A displayed bid of $49.90 for 100 shares is a buyer's displayed price and size; selling more shares can consume lower bids.
Orders & Market Structure
Bid
The highest displayed price a buyer is currently willing to pay.
Plain-English context
Put the definition to work.
Displayed demand can change before your order arrives. A large sale can execute across lower bid levels.
Further reading and verification. Examples are hypothetical, not current quotes or recommendations. Product terms, tax treatment and market rules can change. FINRA — order types and execution