Market makers: the essential players behind the functioning of financial markets
When discussing financial markets, attention is often focused on investors, hedge funds, or investment banks. However, one category of participants plays an equally essential role, despite being much less known to the general public: market makers.
Every day, they enable millions of investors to buy or sell stocks, bonds, currencies, or derivatives within fractions of a second. Without them, many markets would be far less liquid, the spreads between buyers and sellers would be much wider, and certain transactions would become extremely difficult to execute.
Market makers are one of the most important components of the modern financial system, even though they remain largely invisible to most investors.
Read more: How private equity funds are compensated?
What is a market maker?
A market maker is a participant that commits to continuously providing both a bid price and an ask price for a financial asset.
In other words, it is constantly willing to buy a security at one price and immediately sell it at another.
This continuous presence allows investors to execute their orders without having to wait for another market participant willing to trade at exactly the desired price.
The primary role of a market maker is to provide liquidity to financial markets.
The more liquid a market is, the easier it is for investors to buy or sell an asset quickly without causing significant price movements.
Why are market makers indispensable?
Imagine that an investor wants to purchase 10,000 shares of a company.
If there is no seller available at that exact moment, the transaction simply cannot take place.
The market maker intervenes precisely to solve this problem.
It temporarily agrees to sell securities from its own inventory, even though it will later need to buy them back in order to replenish its position.
Conversely, when an investor wishes to sell shares immediately without finding a buyer, the market maker agrees to purchase them.
It therefore acts as a permanent intermediary between buyers and sellers.
Thanks to this activity, financial markets operate smoothly throughout the trading day.
How do market makers make money?
Contrary to popular belief, market makers do not primarily seek to predict market movements.
Their business model is mainly based on the spread, which is the difference between the price at which they buy an asset and the price at which they sell it.
Let's take a simple example.
A market maker may offer to buy a stock at €100 and sell it at €100.05.
The five-cent difference represents its potential compensation.
At first glance, this margin appears extremely small.
However, market makers sometimes execute several million transactions every single day.
It is the enormous trading volumes that make their business highly profitable.
A profession where speed is everything
The market-making business has become extremely technology-driven.
In certain markets, just a few microseconds can make the difference between a profitable trade and a loss.
The leading firms therefore invest massively in their technological infrastructure.
Their servers are located as close as possible to trading venues in order to minimize order execution time.
At the same time, highly sophisticated algorithms continuously adjust quoted prices according to market conditions.
Today, the success of a market maker depends just as much on the quality of its algorithms as on its financial expertise.
The risks of the business
Although their activity may appear relatively mechanical, market makers take significant risks.
When they purchase an asset from an investor, they may be forced to hold it for a short period before finding another buyer.
During that time, the asset's price may move unfavorably.
This phenomenon is known as inventory risk.
The more volatile the markets become, the greater this risk becomes.
Market makers therefore use highly advanced mathematical models to continuously adjust their prices and limit their exposure.
The real challenge is to provide liquidity while constantly managing the risks associated with the positions they hold.
The leading market makers today
The industry is now dominated by a handful of highly specialized global firms.
Companies such as Citadel Securities, Jane Street, Optiver, Flow Traders, and IMC Trading provide a substantial portion of daily liquidity across global financial markets.
These firms primarily recruit engineers, mathematicians, software developers, and quantitative traders capable of designing increasingly sophisticated models.
Their competitive advantage relies as much on technology as on their ability to manage risk.
Market makers during periods of crisis
The role of market makers becomes even more visible during episodes of high market volatility.
When markets decline sharply, many investors simultaneously seek to sell their positions.
Market makers continue providing liquidity, but they generally widen their spreads in order to compensate for the increased level of risk.
In some extreme situations, certain firms may temporarily reduce their activity in order to protect their balance sheet.
This is why financial regulators closely monitor these institutions.
Maintaining liquidity during periods of market stress is one of the most important responsibilities of market makers.
Why this career attracts so many students
Market-making careers are becoming increasingly attractive to students interested in financial markets.
They offer an extremely dynamic environment where decisions are made within milliseconds and where technology plays a central role.
The profiles being sought are highly diverse: engineers, software developers, mathematicians, physicists, as well as finance students with strong quantitative skills.
Recruitment processes are often demanding and include tests in probability, logic, programming, and problem-solving.
Succeeding in market making requires as much analytical rigor as it does speed of thinking.
Conclusion
Market makers play a fundamental role in the functioning of financial markets. By continuously providing both bid and ask prices, they enable investors to trade assets quickly while contributing to the overall liquidity of financial markets.
Without them, markets would be far less efficient, transaction costs would be higher, and volatility would often be much greater.
For students wishing to discover financial markets, understanding the role of market makers is essential. Behind every order executed within milliseconds lie sophisticated algorithms, extremely precise risk management, and teams capable of ensuring that financial markets continue to function efficiently regardless of economic conditions.