Orders & Market Structure

Fill

The execution of all or part of an order.

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, fill helps explain part of what can happen between submitting an order and receiving a fill.

COMMON MISTAKE

Assuming Fill 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.