A listed stock refers to a company's shares that are traded on a recognized stock exchange. When a company undergoes an initial public offering (IPO) and offers its shares to the public, those shares become eligible for trading on a stock exchange. Once listed, investors can buy and sell the company's shares through the exchange's trading platform.

Listing a stock on a recognized exchange provides several advantages. It offers companies access to a broader investor base, allowing them to raise capital and expand their shareholder base. It also provides liquidity to existing shareholders, as they can easily sell their shares in the open market. Additionally, being listed on a stock exchange increases the company's visibility and credibility in the market.

Listed stocks are subject to various regulations and reporting requirements to ensure transparency and protect investors' interests. These requirements include periodic financial reporting, disclosure of material information, and adherence to listing rules set by the exchange.

Investors can trade listed stocks through brokerage accounts, either by placing market orders or limit orders. The prices of listed stocks are determined by supply and demand dynamics in the market and can fluctuate based on factors such as company performance, industry trends, and market sentiment.