Trading halt

Both of the reasons mentioned above are "regulatory" trading halts and are implemented on many major stock exchanges (for example, the NYSE American, NASDAQ, and New York Stock Exchange). When a United States exchange enacts a regulatory halt for a security, other U.S. exchanges that also trade the security will honor the halt. The Over The Counter Bulletin Board (OTCBB) currently uses 5 codes. A "non-regulatory" trading halt occurs if "significant order imbalance between buyers and sellers in a security" exist. (The NASDAQ stock exchange does not implement non-regulatory trading halts.) Before trading resumes, market specialists must determine an appropriate price range in which the security can trade. Unlike regulatory halts, other U.S. exchanges do not always stop trading a security affected by a non-regulatory halt. The OTCBB maintains its own trading halt list and a rolling 6-month history. == Trading suspension ==

A trading suspension occurs when the United States Securities and Exchange Commission (SEC) stops trading for a specific security because of "serious questions ... about a company’s assets, operations, or other financial information." Note that in this case, it is the SEC — not the exchange — stopping the security from being traded. On its web site, the SEC maintains a list of trading suspensions going back to 1995. == Trading curb ==

Trading curbs stop trading for an entire exchange when the market has experienced a drop (or several drops) in value. == See also ==