Rule 104

Rule 104

On the New York Stock Exchange, a rule requiring designated market makers to trade on their own accounts to help ensure a fair and orderly market. The rule also outlines other rights and responsibilities for designated market makers; for example, they must help the NYSE remain sufficiently liquid to provide for fair quotes. Previously, Rule 104 mandated that designated market makers (then known as specialists) not trade on their own accounts, but this was amended in 2008 as part of a wider streamlining of NYSE rules.

Rule 104

A New York Stock Exchange rule that prohibits specialists from trading for their own accounts except when such trades are necessary to maintain a fair and orderly market.