Who else is trading in the market
The market isn't a single opponent, it's many different participants with completely different goals, capital, and time horizons. Knowing who else is trading explains a lot of market movement.
Learning objective: After this lesson, you can name the different kinds of market participants and explain how that shapes market moves.
When beginners talk about the market, they often picture a single opposing force. In reality, very different actors trade there at the same time, with very different intentions.
A retail investor invests their own money, usually on the side, often over years. A day trader opens and closes positions within a single day. A proprietary trading firm deploys the company's own capital, often with clear risk limits and heavy technology behind it.
A hedge fund manages investor money and pursues a specific strategy it sells. A pension fund or asset manager invests very long-term and usually very diversified, often under legal requirements. A market maker continuously quotes buy and sell prices and earns from the spread between them, not from direction.
Two groups are often missing from lists like this: central banks and companies themselves. A central bank doesn't buy and sell bonds and currencies to turn a profit, but to steer interest rates or the exchange rate, and given the sheer size of its trades it can move entire markets. A company becomes a market participant the moment it buys back its own shares: that reduces the number of shares outstanding and can support the price, regardless of how the underlying business is actually doing.
What does NOT follow from this: there's no single method that all professionals use. The groups differ so much in time horizon, capital source, and risk limits that a shared success formula couldn't exist in the first place.
The distinction between groups can be captured along a few dimensions: capital source (own money, company capital, client funds), time horizon (seconds to decades), risk limits (informal to strictly regulated and monitored daily), and success measure (absolute return, return against a benchmark index, or pure spread income with no directional risk).
Institutional investors like pension funds are often subject to regulatory investment limits, such as maximum equity allocations or rating requirements on bonds. That partly explains procyclical behavior that has nothing to do with better or worse market judgment, and everything to do with regulatory constraint.
Market makers and high-frequency traders earn structurally from the bid-ask spread and from venue rebates, not from price direction. Their edge is speed and access to order-book data at microsecond scale, not superior judgment about the future. That's why comparing yourself to this group makes little sense for a retail investor: it's a different business model, not just a faster version of the same one.
Central banks and companies don't fit the usual grid of capital source, time horizon, and success measure, because their actions don't follow a return target. A central bank buys bonds or intervenes in the foreign-exchange market to support monetary-policy goals such as the transmission of the policy rate, or to correct a currency it judges too strong or too weak; the volume behind a single central bank's actions often exceeds that of any private market participant by orders of magnitude. Companies, in turn, become buyers of their own stock through share buybacks, which raises demand and mechanically lifts earnings per share even if total profit stays flat.
| Retail investor | Day trader | Hedge fund | Market maker | |
|---|---|---|---|---|
| Capital source | own money | own or firm capital | client funds | firm capital |
| Typical time horizon | years to decades | minutes to hours | weeks to years | seconds |
| Success measure | reaching own goals | absolute profit | return versus benchmark | spread, regardless of direction |
| Risk limits | self-chosen | mostly informal | contractual and regulatory | strict, automated |
| Main edge | time and low cost | none, empirically usually a disadvantage | capital size and access | speed |
Retail investor
Day trader
Hedge fund
Market maker
Summary
- The market consists of many participants with different goals, not a single opponent.
- There's no single method that all professional participants use.
- Market makers earn from the spread, not from direction, that's a different business model.
Did you get it?
What does a market maker primarily earn from?
The spread between buy and sell price, not from price direction.
Why do pension funds sometimes behave procyclically?
Because of regulatory investment limits, not necessarily their market judgment.
Is there a shared success method across all professional market participants?
No. The groups differ too much in capital source, time horizon, and risk limits for that.
Check your understanding
Sources and further reading
- The European Central Bank publishes the ongoing holdings of its bond-buying programme (APP), showing the scale at which central banks act as market participants. View source ↗
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