Stock Watcher A computer program used by the NYSE that continuously monitors all trading activity in order to detect any illegal trades. Investopedia Says: Should the stock watcher program detect potentially illegal activity such as manipulation or insider trading, the stock watcher department staff will begin an investigation into the trade details. The SEC is consulted for the clarification of legal issues and in the decision of whether disciplinary action is required. Related Terms: Insider Trading Manipulation NYSE Securities & Exchange Commission - SEC |