Sell-side is the part of the financial industry that is involved with the creation, promotion, and sale of stocks, bonds, foreign exchange, and other financial instruments to the public market. The sell-side can also include private capital market instruments such as private placements of debt and equity. Sell-side individuals and firms work to create and service products that are made available to the buy-side of the financial industry.

The sell-side of Wall Street includes investment bankers, who serve as intermediaries between issuers of securities and the investing public, and the market makers who provide liquidity in the public market.