Abstract: A method and system provide real-time, after-hours stock trading to both retail and institutional investors. The system acts as a hub connecting investors from numerous brokerage firms and delivers real-time, after-hours trading services to both retail and institutional investors. It matches buy and sell trade orders placed by different investors on the system, thereby allowing both retail and institutional investors to execute trades with each other either before, during or after-hours. Consistent with the present invention, when the trading system's matching engine determines that a buy order and a sell order from different investors match, it executes and processes the trade. In one implementation, the system's market information is published in real-time on the Internet and is viewable by investors and the general public.

Abstract: A system controls the volume of trading for an individual investor for a given stock and protect against market domination in real-time computerized stock trading systems. These stock trading systems may provide trading environments that do not have sufficient liquidity and may thus be susceptible to market domination due to large trade orders placed typically by large institutions or users with great resources. The system determines a volume limit and rejects or flags new trade orders that make a user's total trading volume for a certain stock exceed the determined volume limit.

Abstract: A system protects against intentional market manipulation in a computerized real-time stock trading system. It determines whether users are attempting to manipulate the trading system's market using schemes such as self-trading and round-robin trading to create a false appearance of trading activity. The trading system matches buy and sell trade orders placed by different users on the system, and the anti-manipulation component receives unique identifiers for each trade order that identify the users placing the trade order. The anti-manipulation component then compares the identifiers to determine, flag and reject artificial manipulation of the trading system's market. These defensive systems may be used in real time stock trading systems that provide after-hours stock trading to both retail and institutional investors.

Abstract: A method and system provide real-time, after-hours stock trading to both retail and institutional investors. The system acts as a hub connecting investors from numerous brokerage firms and delivers real-time, after-hours trading services to both retail and institutional investors. It matches buy and sell trade orders placed by different investors on the system, thereby allowing both retail and institutional investors to execute trades with each other either before, during or after-hours. Consistent with the present invention, when the trading system's matching engine determines that a buy order and a sell order from different investors match, it executes and processes the trade. In one implementation, the system's market information is published in real-time on the Internet and is viewable by investors and the general public.