Robinhood: Who Pays for a Free Trade
Robinhood is a United States retail brokerage that charges no commission on stock trades and instead routes customer orders to wholesale market makers who pay for that flow. The cost did not vanish; it moved into the price at which your order is filled.
How it works
Robinhood is a United States retail brokerage that removed the commission and kept the revenue. You place an order in the app, it is passed to a firm that fills it, and little of it is visible to you.
Those orders are routed to wholesale firms that pay for the right to receive them. The arrangement is payment for order flow, and the buyers are market makers, who profit from the other side of your fill.
So the cost moved from an explicit charge into the price you are filled at. A market order crosses the bid-ask spread, and the distance between your fill and the best available price is where it sits.
What the interface encourages
The interface is built to make trading feel easy, and easy is not neutral. Low friction raises the number of decisions you make, and the count of decisions is where most retail damage lives.
Approval to trade options arrives faster than an understanding of them. A questionnaire is not a course, and a contract that expires behaves nothing like a share. Approval is a permission, not a verdict.
The charting is thin next to a dedicated platform. The app carries the common order types, but a plan made on a small screen with few tools is often not much of one.
In January 2021 the broker restricted the opening of new positions in several heavily traded shares. The stated reason was clearing and capital requirements. A broker’s own obligations can limit what you are able to do.
In practice
Commission-free is not the same as cost-free. The charge moved from a statement line into the price of the fill, which is harder to see and no less real.
The app shows you less of the market than it appears to. Volume and depth are summarised rather than displayed, so what you need to judge a fill is missing.
It suits infrequent buying far better than active trading. Fractional shares and a low barrier to a first account fit somebody buying monthly and then leaving it alone.
An opening gap is where routing quality actually shows up. When the first print sits far from the previous close, spreads widen and a poor fill stops being academic.
A stop order becomes a market order the moment it triggers. True at every broker, and the point where routing quality is hardest to observe, so use a limit order where the trade allows one.
Cost is easier to judge against a bar than against your balance. On this site’s shared history a modelled round trip is 2% of a median bar’s range: modest against normal movement, heavy against a quiet one.
Reading the disclosures yourself
The only current pricing for any broker is the pricing on that broker’s own page. Rates, financing terms and account charges change, and a figure repeated elsewhere was true on some unnamed day. Read it at the source.
United States brokers also publish order routing reports under Securities and Exchange Commission Rule 606. They name the venues an order was sent to and disclose the payments received for that flow. Reading one for a broker you already use turns an abstraction into something concrete.
Two more documents belong on the same afternoon: the margin account agreement and the pattern day trader rule. Both describe limits that apply automatically once your activity crosses a threshold, and neither is written to be discovered afterwards.
What Robinhood is not
- Not free. The commission is gone; the cost was rehoused in the fill.
- Not unusual. Most large United States retail brokers sell order flow, and disclose it.
- Not a professional platform. The tooling is deliberately simple, which is a trade to make knowingly.
- Not a judge of your readiness. A product approval is an account setting, not an assessment of skill.
When it fails
It fails when the app becomes the reason to trade. A quiet trading range offers nothing worth acting on, and an interface in your pocket will still find you something to look at.
It fails on size. The distance between a good fill and an indifferent one scales with the order, so what is trivial on a small position is not trivial on a large one.
It fails when a stop is the whole plan. A stop triggers into whatever liquidity exists at that instant, and a thin book turns a planned exit into an unplanned price.
It fails for anyone who needs to audit execution. Without the venue, the timing and the price improvement in front of you, a good fill and a poor one look identical.
It fails when approval is read as an invitation. Contracts decay and assignment is real, whatever the questionnaire implied.
It fails as a place to learn order handling. Paper trading elsewhere teaches the same mechanics without an account balance attached to the lesson.
The original data
The broker figures come from research/broker-coverage.json, a scan of the 31,760 trading and
investing videos in research/search-study-corpus.jsonl. Counted by title:
- “robinhood”: 76 videos, median 14,423 views, 37 channels, maximum 5,498,788.
- “webull”: 108 videos, median 19,159 views, 49 channels.
- “interactive brokers”: 60 videos, median 60,106 views, 37 channels.
- “fidelity”: 75 videos, median 44,940 views, 35 channels.
- “broker” anywhere in the title: 116 videos, median 27,768 views, 76 channels.
The cost figures come from research/series-measurements.json, produced by
site/measure_series.py. On this site’s shared 576-bar history a round trip costs 0.0098 price
units: 2% of a median bar’s range, 45% of the smallest bar, and more than 10% of the range on 15 of
the 576 bars. Bar ranges run from 0.022 to 2.338, median 0.493.
Robinhood has the lowest median views of the four brokers measured, despite the second-highest video count. Heavy coverage, low interest per video, and the highest single maximum in the set.
Interactive Brokers is the mirror image: the fewest videos, the highest median. Beginner-broker content is crowded and largely ignored; the audience searching for a professional platform is smaller and actually watches. Before opening an account on the strength of a video, read that broker’s current pricing page and its latest Rule 606 routing report.
Related
Start with payment for order flow, which explains the arrangement underneath every commission-free account in the United States. Then read bid-ask spread, because the spread is where a routed order actually pays. Finish with choosing a broker, which sets out what to compare once the headline price stops being the answer.
I have no quarrel with a simple app, and the barrier to a first account being low is genuinely good. What I would not do is let a smooth interface set how often I trade, because the friction I removed was doing a job. I use limit orders nearly everywhere, and I read the routing disclosures rather than the marketing. Ease of use is worth something, but it is not the same thing as a good fill.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.