Another broker-dealer is contacted, and that company purchases the shares from a market maker. This is known as interpositioning since it results in two levels of transaction costs.
Interposition is the unlawful act of placing an extraneous third party, often another broker-dealer, between the client and the best price currently on the market with the express intent of earning additional fees at the expense of the consumer.
The act of putting a different broker-dealer between a customer and the best market is known as interposition. Interposition is not allowed unless it can be shown that the client got a better deal as a result.
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