Maker-taker is an exchange or trading platform pricing system. Its basic structure gives a transaction rebate to market makers providing liquidity (the makers); and charges a transaction fee to customers who take liquidity out of the market (the takers).
Firms that "make" a trade happen by posting buy and sell offers are paid a fee, typically between about 20 cents and 30 cents for every 100 shares traded. Firms that "take" those shares are charged a fee. 
The maker-taker model is in contrast with the "customer priority" model. Under customer priority, any account identified as “customer” goes to the head of the queue for priority of fill, without paying a transaction fee to the exchange. The exchange stays in business by charging market makers fees for transactions and payment for order flow. The payment for order flow is paid to brokerage firms as an inducement to send their orders to a given exchange.
Critics of the maker-taker model that the fees might be giving brokers incentives to prioritize maker-taker fees over trade execution quality. Subsequent to a study by Woodbine Associates which highlighted the potential conflict of interest, Senator Charles Schumer requested that the Securities and Exchange Commission study the issue.
The maker-taker model in options trading came from a pricing model that was used by the equity market. Developed by Island ECN in 1997, it was designed to give liquidity providers an incentive to trade in markets where spreads are extremely tight. It rewards liquidity providers by giving them rebates, and it charges customers who remove liquidity from the exchange. Makers would get a $0.002/share rebate and takers would pay a $0.003/share fee. The exchange would get the difference which was $0.001/share. Maker-taker pricing is predicated on a penny-increment environment.
The maker-taker model was only adopted by the options exchanges fairly recently and has been controversial. After the Chicago Board Options Exchange (CBOE) got rid of customer transaction fees in May 2000, the idea of passing fees along to the customer has been anathema in the options market. There was a fear in the industry that charging customers for access to liquidity would inhibit the market's growth.
NYSE Euronext's Arca Options platform and Nasdaq OMX Group's NOM platform both use a "maker-taker" pricing system, as does the new options exchange launched by BATS. The Chicago Board Options Exchange and the International Securities Exchange both use the customer priority, payment-for-order-flow system. However, in March 2010 the ISE introduced a maker-taker structure for options on the PowerShares QQQ Exchange Traded Fund, Citigroup, Inc., and Bank of America Corporation.
Maker-Taker model distorts pricing. The price that we see as a bid/offer price in the market is not the real price because there are rebates and other discounts that are applied, so investors don't have a view of the actual price. The maker-taker model added to the trading noise that has crowded out the true supply and demand price discovery process. HFT’s can essentially make a profit by buying and selling a stock at the same price due to these rebates. In addition, high frequency traders could take advantage of rebates by buying and selling shares for the same price in order to make money on the arbitrage of rebates. This process can distort true price discovery of assets.
Maker-taker payment for order flow is bad for markets. Maker-taker creates false liquidity by attracting people who are solely to try to make rebates and not actually trade and hold risk and that liquidity leaves quickly and is not subject to any contractual obligation like a market-maker would be.
By coordinating a cut in trading fees, regulators could stem the migration of US equity trading to dark pools. However, high charges of maker-taker pushes transactions off public markets to lower-cost private platforms such as dark pool.
- ↑ Schumer to SEC: Fix 'Maker-Taker' Fees. Wall Street Journal.
- ↑ Balancing the Options. Futures Industry Magazine.
- ↑ U.S. senator seeks reform of 'maker-taker' pricing model. Reuters.
- ↑ It’s Time To Abolish The Maker/Taker Model. Themis Trading.
- ↑ Options Maker-Taker Markets Gain Steam. Traders Magazine.
- ↑ BATS bets on simple U.S. options price plan. Reuters.
- ↑ Maker-Taker Pricing Effects on Market Quotations. USC Marshall.
- ↑ An Example Of HFT Distorting Price Discovery Via Maker-Taker Rebates. Floating Path.
- ↑ ICE CEO Sprecher wants regulators to look at ‘maker-taker' trading. Reuters.
- ↑ Flawed Fee Model Distorts U.S. Trading, Virtu Says. Bloomberg.