Glossary
Spread
The gap between the best available bid and ask.
Reviewed as part of Exchange Order Types and Market Structure, using the primary references listed below. Updated 2026-07-19.
Plain-English meaning
Spread is used here to describe the gap between the best available bid and ask. In the daily board, the word is grouped by the role it performs rather than by spelling or market popularity.
You may encounter it in a product interface, technical document, risk report, policy paper, or market dashboard. The term is included for recognition and comparison, not as a product recommendation.
Important boundary
Spread is a quoted condition; slippage compares expected and actual execution.
When this word appears in a report, identify the mechanism being described before treating the label as a conclusion. Similar terms can point to different causes, controls, or outcomes.
Why it belongs with Market Depth
These terms describe order-book conditions and the costs that appear when a trade gets large.
When solving the puzzle, compare the job this term performs with nearby cards. A correct group usually shares a function, risk type, workflow, or market structure rather than simply sharing similar wording.
Where you might see it
You might encounter this term while reading educational explainers, product documentation, risk disclosures, market dashboards, or beginner guides. Always separate vocabulary learning from financial decision-making.
Reading cue
Why an order instruction is not an execution guarantee
Use the full guide's applied scenario to ask where Spread enters the process, what evidence supports it, and which nearby concept it could be confused with.
Read the complete applied scenarioNearby concepts
Compare before you memorize
Market order
An instruction that prioritizes execution at available prices.
It does not promise the last displayed price.Limit order
An instruction with a maximum buy price or minimum sell price.
It controls a boundary but does not guarantee a fill.Price impact
Price movement associated with consuming available liquidity.
It is related to order size and depth, not just general market volatility.Knowledge check
Check the distinction
Why should a reader distinguish spread from slippage?
Spread is visible before an order, while slippage measures the difference between an expected and realized result.
Source trail
References behind this explanation
These references support the surrounding guide and concept boundaries. Open the full source when you need the original technical or policy context.
Primary investor education on market, limit, and stop orders and their trade-offs.
Investor.gov, U.S. Securities and Exchange CommissionExecuting an orderExplains routing, execution timing, and why quoted and realized prices may differ.