I saw the CEO of Worldspreads interviewed. He said the business model is "if I offer 0 spreads on say, FTSE EUR/USD and DOW, then people will switch over to my company and trade other products that do quote a spreads". So basically it is a loss leader. Also you need 5k minimum deposit to take advantage so i suppose they earn interest off the deposits.
As for whether SB firms make money off you losing i have no idea. But what I do know is the success rate is not much higher in DMA. And I know a couple of guys that have worked for SB companies and they say there is no need to hedge in the real market as there is typically an even number of punters going long/short at any one time. If there is a skew of say 55% long 45% short they will hedge that 5% to stay market neutral.
Also there is no way they can move the market to stop people out, that is an urban myth. Say product x is trading 60 in the live market but the Sb firm move their price to 65 to hit clients stops there is a risk free arb there, sell SB firm at 65 for £1000 a point. Buy 100 lots of underlying for a free 5 ticks.
As for whether SB firms make money off you losing i have no idea. But what I do know is the success rate is not much higher in DMA. And I know a couple of guys that have worked for SB companies and they say there is no need to hedge in the real market as there is typically an even number of punters going long/short at any one time. If there is a skew of say 55% long 45% short they will hedge that 5% to stay market neutral.
Also there is no way they can move the market to stop people out, that is an urban myth. Say product x is trading 60 in the live market but the Sb firm move their price to 65 to hit clients stops there is a risk free arb there, sell SB firm at 65 for £1000 a point. Buy 100 lots of underlying for a free 5 ticks.