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Note that the market-maker behavior in this model is highly stylized.
For the market-maker model, it would also be feasible to introduce a changing variance.
With the market-maker scenario, the attractors can extend into both positive and negative phases.
Under a market-maker scenario, this paper studies how the dynamics of asset prices are affected by different risk attitudes and different learning schemes of different types of investors.
Our focus in this paper is on both the theoretical and numerical behavior of asset prices resulting from the interaction of heterogeneous investors under a (admittedly stylized) market-maker price-setting mechanism.
The differential between the buying and selling quotes, or the bidoffer spread, is how the market-maker makes profit.
However, when an intermediary is trading on its own account and not merely hedging financial exposures created in its market-maker role, potential conflicts of interest arise.
Many influential market-makers believe that that is inevitable.
Heading (b) is concerned with occasional market-makers.
If market-makers cannot operate with full disclosure of price and quantities, they ought not to be in the business of market-making.
I read in the press recently that at least one of the regulatory bodies will try to reduce disclosure requirements in order to protect market-makers.
Market-makers can see the total amount of index trading daily and where they rank against their peer group.
The crisis has renewed debate regarding the duty of financial intermediaries or market-makers such as investment banks to their clients.
Trades negotiated by market-makers usually bear standard terms.
Market-makers use the bid-ask spread to recoup this loss from uninformed traders, who have private reasons for trading, for example, because of liquidity needs.