Answer:
the bid-ask spread
Explanation:
According to my research on different investment strategies, I can say that based on the information provided within the question the dealers profits come from the bid-ask spread. This is known as the difference between the prices quoted for an immediate sale and an immediate purchase of a particular asset such as stocks, securities, and futures contracts. Used by many people such as brokers and dealers in order to make profits by buying low and selling high.
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