What do the letters NB mean in front of a stock listing?

The letters "NB" in front of a stock listing typically indicate that the stock is a "New Bond" or that it is a "New Issue" of a bond or stock. This designation helps investors identify securities that have recently been issued and may not yet have established trading histories. In some cases, "NB" can also refer to specific trading conditions or characteristics related to the stock or bond. Always check the specific context or exchange guidelines for precise meanings.