The market maker: who holds the book when nobody is trading
beginner
Automated material · TradeAlmanac editorial deskDraft prepared by a language model from our stored data; not reviewed by an editor.
In a liquid security there are enough orders without special measures. In every other case somebody has to make buying and selling possible.
The commitment
A market maker signs a contract with the exchange or the issuer and undertakes to maintain buy and sell orders throughout the trading day, within a limited spread and at a stated volume.
In return it receives a fee or preferential commission terms.
Why it is needed
Without one, a narrow instrument would have an empty book: a trade would become possible only when two opposing orders happened to coincide.
This matters especially for exchange-traded funds: a unit's price has to stay close to the value of the fund's assets, and it is the market maker that keeps it there — BPIF, ETF and mutual fund: three forms of one idea.
What an investor sees
A steady narrow spread in an instrument with few trades is almost certainly a market maker at work. A suddenly widening spread in such a security signals that its obligations have run out.
The practical conclusion
A market maker improves the terms of entry and exit but does not turn an illiquid instrument into a liquid one. Position size still has to be judged against real turnover — Liquidity: noticed only once it runs out.
Draft prepared by a language model from our stored data; not reviewed by an editor.
Model: claude-opus-5
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