best bid
The highest price at which competing market makers are currently offering to buy a security. A market order to sell is filled at the best bid, which increases and decreases continually in response to changes in supply and demand as buyers and sellers enter and exit the market. Compare to Ask; Best Ask; Bid. See national best bid and offer (NBBO).
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thin market
market if touched (MIT)
locked market
Electronic Communication Network (ECN)
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