[MtnClimber]

What Is a Bourse?
A bourse is a market organized for the purpose of buying and selling securities, commodities, options and other investments. The term bourse is most often used in Europe and can be synonymous with an exchange. “Bourse” is based on the residence belonging to textile merchant Robert Van der Burse, where Belgian traders and financiers would gather and trade with one another in the 13th century.

[Texas Eagle]

A bourse is a market organized for the purpose of buying and selling securities, commodities, options and other investments.

"But that's not important right now."