Orders & Market Structure

Slippage

The difference between an expected transaction price and the actual execution price.

Plain-English context

Why it matters

Market-structure language affects how an instruction reaches the market and the price or execution a trader may actually receive.

EXAMPLE

On a quote of $49.95 bid and $50.05 ask, slippage helps explain part of what can happen between submitting an order and receiving a fill.

COMMON MISTAKE

Assuming Slippage has one universal interpretation without checking the source, rules, timeframe or methodology.

Use current definitions. Product terms, tax treatment and market rules can change. Confirm important details with official disclosures, regulators and regulated providers.