Definitions for "opening transaction"
The trade which starts a position, whether long or short.
A trade in an option account that establishes a new option position, thus adding to the net position of an investor.
Applies to derivative products. (1) Buy or sell transaction that creates a position out of a flat one (writing an option short or buying an option long). Antithesis of closing transaction. (2) First transaction of the day in a stock.