THE BROKER THAT MADE STOCK TRADING COST ALMOST NOTHING
For decades, buying a stock usually meant paying a broker a commission.
Then a tiny startup from Palo Alto showed up with a strange proposition:
What if buying a stock cost $0?
That company was Robinhood.
And its idea eventually changed the pricing model of the entire U.S. retail brokerage industry.
BEFORE ROBINHOOD, TRADING HAD A PRICE
In the early 2010s, paying several dollars every time you bought or sold a stock was normal.
A 2013 description of Robinhood's idea compared its planned service with brokers charging roughly $7–$10 per trade.
That created an obvious problem for small investors.
Imagine you have:
$100 to invest
and your broker charges:
$10 to buy
You have already lost:
10% of your money
before the investment has even moved.
For someone investing $20 or $50 at a time, commissions could make small trades particularly unattractive.
THEN TWO GUYS TRIED SOMETHING DIFFERENT
Robinhood was founded in 2013 by Vlad Tenev and Baiju Bhatt.
Their idea wasn't simply:
"Let's make a cheaper brokerage."
It was:
"Let's remove the commission completely."
The company built a technology-heavy brokerage designed around mobile trading and automation.
The pitch was incredibly simple:
Start investing. Stop paying.
When Robinhood opened to the public in March 2015, the company said nearly 800,000 people had joined its waitlist.
It also said customers had already saved about $5 million in commissions and traded more than $212 million through the platform.
BUT HOW CAN A BROKER MAKE MONEY FROM $0 TRADES?
This is where the business model becomes interesting.
Robinhood didn't need to make its money primarily from a commission charged directly to you.
Instead, one important revenue source was:
Payment for order flow.
The basic process looked like this:
You place an order
↓
Robinhood receives it
↓
Robinhood routes the order to a market maker
↓
The market maker executes it
↓
The market maker pays Robinhood a rebate
The customer sees:
$0 commission
Robinhood sees:
Revenue
Robinhood later explained that market makers pay rebates for customer order flow, while the market makers themselves compete to execute those orders.
THE AMOUNT PER TRADE COULD BE TINY
This is where scale became important.
Robinhood gave an example from the fourth quarter of 2020:
It earned approximately $0.0023 per equity share through payment for order flow.
That's just 0.23 cents per share.
For a 100-share order:
100 × $0.0023 = $0.23
Only 23 cents.
But multiply tiny amounts by millions of trades and the economics become very different.
This is the same basic principle behind many high-volume businesses:
Tiny revenue per transaction × enormous volume = substantial revenue
ROBINHOOD WASN'T THE FIRST COMPANY TO USE ORDER FLOW
Payment for order flow existed long before Robinhood.
Traditional brokers were already receiving these payments.
The difference was that Robinhood used the economics to support a radically different customer proposition:
Don't charge the customer a trading commission.
That helped Robinhood attract people who might otherwise have never opened a brokerage account.
And the strategy worked well enough to force much larger companies to react.
THEN WALL STREET'S BIG BROKERS FOLLOWED
In October 2019, the brokerage industry changed dramatically.
Charles Schwab announced that it would eliminate commissions on U.S. stocks, ETFs and options.
Then came:
TD Ameritrade
E*TRADE
and later Fidelity.
The old $5–$10 commission model was rapidly disappearing.
Robinhood had not simply created a cheap brokerage.
It had helped make the old pricing model difficult to defend.
$0 BECAME THE NEW NORMAL
This is the part that made the story much bigger than Robinhood.
Before:
Buy stock → pay commission
After the industry shifted:
Buy stock → $0 commission
Today, major U.S. brokers including Charles Schwab advertise $0 commissions on online listed stock and ETF trades.
The customer-facing price had effectively collapsed.
But the businesses still needed revenue.
So the economics moved elsewhere.
"FREE" DIDN'T MEAN THERE WERE NO OTHER REVENUE STREAMS
Robinhood eventually diversified its business.
Revenue could come from things such as:
Its 2021 SEC filing explained that transaction-based revenue from market makers was a major part of its model.
That distinction matters.
$0 commission
doesn't mean:
$0 revenue generated by the customer.
It means the company found another way to monetize the relationship.
THE MODEL ALSO CREATED CONTROVERSY
Payment for order flow has attracted regulatory scrutiny because a broker can receive compensation for routing customer orders.
That creates an obvious question:
Does the broker always have the strongest incentive to obtain the best possible execution for the customer?
The SEC charged Robinhood in 2020 with misleading customers about payment for order flow and with failing to satisfy its duty of best execution during the period examined by the regulator. Robinhood agreed to pay $65 million to settle those charges.
That doesn't mean commission-free trading itself was fraudulent.
It shows that how a "free" financial product makes money can matter just as much as the advertised price.
THE REAL REVOLUTION WAS PSYCHOLOGICAL
Robinhood didn't just change the cost of trading.
It changed what customers expected.
Once people became accustomed to:
$0
it became much harder for a traditional broker to say:
"Pay us $7 for the same basic trade."
The price of the transaction had become almost irrelevant to the customer.
The competition moved toward:
User experience
Speed
Mobile apps
Fractional shares
Research
Subscriptions
Interest rates
Other financial products
The commission stopped being the centerpiece.
THE BUSINESS LESSON
Robinhood demonstrates an important strategy:
You don't always have to make an existing product cheaper.
Sometimes you can remove the old pricing model entirely.
The company took a business that traditionally looked like:
Customer pays → broker earns commission
and helped push the industry toward:
Customer trades → broker monetizes the transaction elsewhere
That change was powerful enough that some of the industry's biggest companies eventually copied the $0 commission model.
MAACAT PERSPECTIVE
Robinhood's most important product wasn't necessarily the app.
It was the idea that a stock trade didn't have to come with a visible price tag.
The company entered an industry where customers had become accustomed to paying several dollars for every transaction.
Then it made the headline price:
$0.
Competitors eventually followed.
Today, commission-free trading is so common that paying a traditional stock commission can seem almost strange.
That's the business lesson:
Sometimes the biggest disruption isn't creating a better product.
It's changing what customers believe the product should cost.
