The open. After-hours markets remain open as do other exchanges in other countries and time zones, which provides opportunity for the price to change right up until the open in many cases.is the start of a new day, though it is important to that that doesn't necessarily trading hasn't been going on right before the
The New York opening bell. At 9:30 am Eastern time, it rings. At that time, the last trading price for each security on the exchange the day before (the closing price) becomes the opening price, or the .
For example, if Company XYZ's stock was $4 per share at the end of the trading day yesterday, its opening price likely be $4 when the exchange today (although overnight trading on other exchanges might affect the opening price).
In themarkets, opening price refers to the price of a security at the beginning of the trading day.