Maybe there’s a misperception about the task / role of market makers. With DABs, you eliminate so called introducing brokers, but certainly not the market-makers. Without MM’s there would be not much trading going on on the exchanges.
Introducing brokers are those who have direct access to the exchanges and take over orderflow from those brokers and institutions ( i.e. mutual and hedge funds ) who don’t have this access. A number of online-brokers don’t have any direct access and so they route all customer orders through the introducing broker ( IB is such an introducing broker ) which can be a merketmaker also !
Furthermore :
“It should also be noted that market makers are required by law to give customers the best bid or ask price for each market order transaction. This ensures a fair and reasonable two-sided market.” ( Remark : no such obligation exists in pre- and aftermarket hours or for limit orders !!! )
Check also :
http://www.investopedia.com/university/electronictrading/trading3.asp
and
http://stocks.about.com/od/tradingbasics/a/Marketmak011205.htm
DAT( direct access trading ) is a system that allows a client to trade directly with another client, a market maker on Nasdaq, or a specialist on the floor of an exchange without broker interference.
ECN’s like Island, Archipelago etc. provide only the plattform were buyers and sellers can meet (electronically ).
(ECN= Electronic Commerce Networks )
It’s still the market makers who provide liquidity in a trading issue, not the ECN or the exchange.
The only difference compared to, say floor traders on the NYSE is, that on ECN’s and Nasdaq, there are no specialists for a certain stock.
Market-Makers ( large trading houses and brokerages ) decide, for which stock they provide a liquid market. But in any case, a private traders order goes into the orderbook via a market-maker - the one who provides access to the market for your broker.
Market makers live mainly from the spread - not from comissions. Actually, some market-makers even pay Brokers in order to get all their orderflow.
I.e. say your broker is Etrade, then Etrade routes your order through it’s preferred channel ( Market-Maker ). The marketmaker might offer a little higher spread or ist faster in excution and makes a cent here and there - given the volume market-makers move on each trading day, these little spreads add up significantly and provide the major revenue source for them. That’s the benefit. On the other hand, without a marketmaker, a stock would have much higher volatilty and probaly much higher spreads, because if there are only few buyers and sellers with bids far away from each other, the trade would never been matched.
The marketmaker has always to provide a market on both sides of the trade, so you can be sure, that your stock can be sold - however, he’s not obliged to stick with a certain spread. It’s up to him ( and the competition ) to define his prices. If he’s too far away from a market, he doesn’t make any trades and hence no business.
So the strategy of Marketmakers is always to buy on the way down and sell on the way up… and be flat at the end of the day - but that’s up them.
A direct accessbroker is linked directly with the ECN and your order is displayed at the ECN you selected as a trader in your workstation.
For most private traders ( not daytrader though ) , it is unappropriate to go this route, since they would have to follow prices on all other ECN’s in order to make sure, the to get the best prices offered on all markets.
Hence many DAB brokers offer so called “smart routing” fucntionality , which selects already the best price for yoour order on all ECN’s and the best price should fill your order. Most of the time , this works very well.
The good thing for a trader is, that in popular stocks, many marketmakers ( maybe 30 or 40 ) meet on the ECNs and compete in the same stock. Hence spreads are low in order to avoid arbitrage trades by other Pro’s.
In less liquid stocks, the situation is somewhat different, but actually, as a retail investor, there’s not much you could do about it - with or without direct access.
In a nutshell :
eliminating market-makers by using direct access is not really possible - someone has to provide the liquidity in a stock.
So you may buy from one MM and sell to another.
Unless you trade huge blocks of 5K or 10K shares several times a day in less liquid stocks, you don’t have to worry about the quality of your executions.
Markets are very competitive today and no intraday gap lasts very long.
A different story is Instinet - were only institutions trade large blocks.
http://www.instinet.com/
For more info about how ECN’s work :
http://www.island.com/about/index.asp