Beginner · updated September 2026 · ~5 min read

What Is a Broker? The Middleman, Explained

This guide is about the broker itself — the firm you trade through. The account you open with one is covered in What Is a Brokerage Account?

You cannot walk up to a stock exchange and buy shares directly. To actually own a piece of a company, you go through a broker — and today that usually means an app on your phone.

What a broker is

A broker (or brokerage) is a licensed, regulated business that buys and sells investments on your behalf. Stock exchanges only accept orders from their approved members, so the broker is the middleman that connects an ordinary investor to the market. When you tap “buy” in an investing app, your broker routes that order to an exchange and completes the trade for you.

◆ KEY POINT

A broker is your licensed gateway to the market. You give it instructions; it executes them at the exchange and holds the resulting shares in your account.

What a broker actually does for you

Executes your orders. It sends your buy and sell instructions to the market and gets them filled (see market vs. limit orders).
Holds your account. Your cash and your shares live in a brokerage account, and the broker keeps records of what you own.
Provides tools. Price quotes, charts, research, and the interface you place trades through.
Handles the paperwork. Tax slips, dividend payments, and — for Canadians — registered accounts like the TFSA and RRSP.

Types of brokers

Discount / online brokers

These are the self-directed apps and websites most beginners use. You make your own decisions and place your own trades, and costs are low. Many now charge little or no commission on stock and ETF trades. They give you tools and access but do not tell you what to buy.

Full-service brokers

These provide personalised advice, financial planning, and a human advisor who can make recommendations or manage a portfolio for you. They charge more — often a percentage of your assets or higher fees — in exchange for that guidance.

Robo-advisors

A middle option: software builds and manages a diversified portfolio for you based on your goals and comfort with risk, usually for a modest fee. Good for hands-off investors who still want diversification without picking individual stocks.

How a trade actually flows

1. You enter an order in your broker's app — say, buy 10 shares of a company.
2. The broker routes the order to a stock exchange or another venue where buyers and sellers meet.
3. A matching seller is found and the trade executes at an agreed price.
4. The shares are recorded to your account and the cash is deducted. Settlement (the official transfer) finishes a short time later.

All of this happens in seconds, which is why it feels as simple as buying something online.

What to look at when comparing brokers

Fees and commissions. Trading costs, account fees, and currency-conversion charges (important when buying U.S. stocks from Canada).
Available accounts. Does it offer the registered accounts you want (TFSA, RRSP)?
Regulation and protection. In Canada, reputable brokers are regulated and client accounts are covered by an investor-protection fund up to set limits if the firm fails. This protects against the broker collapsing — not against your investments losing value.
Usability and tools. A clear interface and useful research matter, especially for beginners.

This is educational information to help you understand the landscape, not a recommendation of any particular broker.

The bottom line

A broker is simply the licensed connector between you and the market — the practical answer to “so how do I actually buy a stock?” Once you have opened and funded a brokerage account, placing a trade is straightforward. Choosing thoughtfully, and understanding the fees you pay, helps you avoid one of the quieter beginner mistakes: letting costs slowly erode your returns.

◆ Try it yourself

Upload any chart to the free AI Chart Reader and get a plain-English grade (A–D) with the key levels — 1 free every day.

Frequently asked

Why can't I buy shares directly from a stock exchange?

Exchanges only accept orders from their approved members, so you need a broker as the licensed middleman. When you tap buy in an investing app, your broker routes that order to an exchange and completes the trade for you. The broker also holds the resulting shares and cash in your account.

What is the difference between a discount broker and a full-service broker?

A discount broker is a self-directed app or website where you make your own decisions at low cost, while a full-service broker provides personalized advice and human guidance for higher fees. Many discount brokers now charge little or no commission on stock and ETF trades. Robo-advisors sit in between, using software to build and manage a diversified portfolio for a modest fee.

Is my money safe if my broker goes out of business?

In Canada, reputable brokers are regulated and client accounts are covered by an investor-protection fund up to set limits if the firm fails. Important to understand, this protects you against the broker collapsing, not against your investments losing value. Market losses are never covered by that protection.

What should I compare when choosing a broker?

Look at fees and commissions, the account types offered, regulation and investor protection, and how usable the tools are. Currency-conversion charges matter especially when buying U.S. stocks from Canada, and you will want to check whether the broker offers registered accounts like a TFSA or RRSP. This is educational context, not a recommendation of any particular broker.

Get the biggest movers in your inbox — free

Plain-English market emails. Pick how often you hear from us.

How often?

No spam · unsubscribe anytime.

Keep learning:

Educational only — not financial advice. Trader Club is a research & learning tool. Nothing here is a recommendation to buy, sell, or hold any security. Trading is risky and you can lose money. Do your own research.