market maker
noun
A person or company who undertakes to quote at all times both a buy and a sell price for a financial instrument.
Discussion
yes in trader bro speak
market etymology:
> The god Mercurius was probably the god of exchange… the god's name was borrowed from Etruscan; in principle, the same is possible for the stem *merk- altogether…
> early 12c., "a meeting at a fixed time for buying and selling livestock and provisions, an occasion on which goods are publicly exposed for sale and buyers assemble to purchase