See which stocks are moving in after-hours trading.
System response and account access times may vary due to a variety of factors, including trading volumes, market conditions, system performance, and other factors. It is important to understand that some ECNs are regulated exchanges, others are sidelines of broker-dealers, and others are unregulated. Investors may trade in the Pre-Market 8 00-9 30 a. Most ECNs are affiliated with online brokerage firms and have their own rules. As originally published, this story contained an error.