When an investor places an order with their brokerage to buy or sell an asset, there’s a certain set of steps that take place behind the scenes to fulfill it. That’s referred to as an order flow, and that involves some payments between market makers and brokerages in order to keep orders moving through the pipeline. With that in mind, payment for order flow (PFOF) involves market makers paying brokers for their clients’ order flow.
It can be beneficial for investors to know about the order flow process and payments involved, as it is a variable in how much they ultimately end up paying for trading, if anything. And it’s also been a somewhat controversial practice, despite the fact that it’s become commonplace in today’s market.[1]
Key Points
- Payment for order flow (PFOF) involves brokerages routing customer orders to market makers for a fee, enabling commission-free trading.
- PFOF allows brokerages to offer commission-free trading, enhanced liquidity, and potential price improvements to retail investors.
- Market makers provide liquidity in the options market, executing trades and offering price improvements to retail investors, and PFOF involves brokers routing their trades to specific market makers.
- PFOF has faced controversy, with critics citing a conflict of interest for brokerages, which may prioritize revenue over the best prices for customers.
- Regulatory scrutiny has been applied to PFOF, with the DOJ investigating potential market maker profiteering at the expense of retail investors; brokers today must adhere to specific regulatory requirements.[2]
What Is Payment for Order Flow (PFOF)?
Payment for order flow (PFOF) refers to the practice of retail brokerages routing customer orders to market makers, usually for a small fee that’s less than a penny. Market makers, who are required to deliver the “best execution,” carry out the retail orders, profiting off small differences between what shares were bought and sold for. Retail brokerages, in turn, use the rebates they collect to offer customers lower trading fees.
What Are Market Makers?
Market makers — also known as electronic trading firms — are regulated firms that buy and sell shares all day, collecting profits from bid-ask spreads. The market maker can execute trades from their own inventory or in the market. Offering quotes and bidding on both sides of the market helps keep it liquid.
Market makers that execute retail orders are also called wholesalers. The money that market makers collect from PFOF is usually fractions of a cent on each share, but these are reliable profits that can turn into hundreds of millions in revenue a year. In recent years, a number of firms have exited or sold their wholesaling businesses, leaving just a handful of electronic trading firms that handle PFOF.
In addition to profits from stock spreads, the orders from brokerage firms give market makers valuable market data on retail trading flows. When it comes to using institutional or retail investors, market makers also prefer trading with the latter because larger market players like hedge funds can trade many shares at once. This can cause big shifts in prices, hitting market makers with losses.
How Does Payment for Order Flow Work?
Here’s a step-by-step guide to how payment for order flow generally works:
- A retail investor puts in a buy or sell order through their brokerage account.
- The brokerage firm routes the order to a market maker.
- The broker collects a small fee or rebate – the “payment” for sending the “order flow” or PFOF.
- The market maker is required to find the “best execution,” which could mean the best price, swiftest trade, or the trade most likely to get the order done.
The rebates allow companies offering brokerage accounts to subsidize low-cost or zero-commission trading for customers. It also frees them to outsource the task of executing millions of customer orders.
Usually the amount in rebates a brokerage receives is tied to the size of the trades. Smaller orders are less likely to have an impact on market prices, motivating market makers to pay more for them. The type of stocks traded can also affect how much they get paid for in rebates, since volatile stocks have wider spreads and market makers profit more from them.
Why Is PFOF Controversial?
While widespread and legal, payment for order flow is controversial. Critics argue it poses a conflict of interest by incentivizing brokerages to boost their revenue rather than ensure good prices for customers. The requirement of best execution by the Securities and Exchange Commission (SEC) doesn’t necessarily mean “best price” since price, speed, and liquidity are among several factors considered when it comes to execution quality.[3]
Defenders of PFOF say that retail investors benefit from the practice through enhanced liquidity, the ability to get trades done. They also point to data that shows customers enjoy better prices than they would have on public stock exchanges. But perhaps the biggest gain for retail investors is the commission-free trading that is now a mainstay in today’s equity markets.
PFOF in the Options Market
Payment for order flow is more prevalent in options trading because of the many different types of contracts. Options give purchasers the right, but not the obligation, to buy or sell an underlying asset. Every stock option has a strike price, the price at which the investor can exercise the contract, and an expiration date, which is the day on which the contract expires.
Market makers play a key role in providing liquidity for the thousands of contracts with varying strike prices and expiration dates.
The options market also tends to be more lucrative for the brokerage firm and market maker. That’s because options contracts trading is more illiquid, potentially resulting in larger spreads for the market maker.
Quick Tip: Options can be a cost-efficient way to place certain trades, because you typically purchase options contracts, not the underlying security. That said, options trading can be risky, and best done by those who are not entirely new to investing.
Criticism of Payment for Order Flow
Payment for order flow was pioneered in the 1980s by Bernie Madoff, who later pleaded guilty to running one of the largest Ponzi schemes in U.S. history.
Critics argue retail investors can get a poor deal from PFOF. Since market makers and brokerages are only required to provide “best execution” and not necessarily the “best possible price,” firms can make trades that are profitable for themselves but not necessarily in the best interest of individual investors.
As such, regulators have proposed reforms to PFOF, and in 2024, the SEC did adopt some amendments that updated required disclosures.[4]
Defenders of Payment For Order Flow
Proponents of payment for order flow argue that both sides — the retail investors and the market makers — win from the arrangement. Here are the ways retail customers can benefit from PFOF, according to its defenders:
- No Commissions: In recent years, the price of trading has collapsed and is now zero at some of the biggest online brokerage firms. While competition has been a big part of that shift, PFOF has helped bring about low trading transactions for mom-and-pop investors. For context, online trading commissions were $40 or so per trade in the 1990s.
- Liquidity: Particularly in the options market, where there can be thousands of contracts with different strike prices and expiration dates, market makers help provide trading liquidity, ensuring that retail customer orders get executed in a timely manner.
- Price Improvement: Brokerages can provide “price improvement,” when customers get a better price than they would on a public stock exchange.
- Transparency: SEC Rules 605[5] and 606[6] require brokers to disclose statistics on execution quality for customer orders and general overview of routing practices. Customers are also allowed to request information on which venues their orders were sent to. Starting in 2020, brokers also had to give figures on net payments received each month from market makers.
The Takeaway
Payment for order flow (PFOF) refers to the practice of retail brokerages routing customer orders to market makers, usually for a small fee. Payment for order flow has been controversial, but it’s become a key part of financial markets when it comes to stock and options trading today.
Industry observers have said that for retail investors weighing the trade-off between low trading costs versus good prices, it may come down to the size of their trades. For smaller trades, the benefits of saving money on commissions may surpass any gains from price improvement. For investors trading hundreds or thousands of shares at a time, getting better prices may be a bigger priority.
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FAQ
What is payment for order flow (PFOF)?
Payment for order flow, or PFOF, refers to the practice of retail brokers routing their customers’ orders to specific market makers in exchange for a fee.
Why is PFOF controversial?
The crux of the criticism surrounding PFOF involves brokers putting their own financial interests ahead of their clients. Specifically, brokers may be more concerned with generating PFOF-related fees than ensuring their clients receive the best order flow treatment possible.
What are common defenses of PFOF?
Defenders of PFOF say that retail investors benefit from the practice through enhanced liquidity, the ability to get trades done, and low-cost or commission-free trading.
Article Sources
- Congress.gov. Payment for Order Flow: The SEC Proposes Reforms.
- Congress.gov. Payment for Order Flow (PFOF) and Broker-Dealer Regulation.
- FINRA. 5310. Best Execution and Interpositioning.
- SEC. SEC Adopts Amendments to Enhance Disclosure of Order Execution Information.
- SEC. Disclosure of Order Execution Information.
- SEC. 17 CFR Parts 240 and 242.
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