Primary market vs secondary market: what is the difference?

A primary market is the market for the first sale of a security by its issuer. That is the primary market definition, and the meaning of the term follows from it. Explained simply, the money goes to the company or the state that issues the security. In the stock market, a company sells new shares in an initial public offering (IPO) or later in a capital increase. For bonds, the issuer sells a new bond to banks and investors.

An IPO is one primary market event, the first sale of a company's shares to the public. A capital increase and a bond issue are primary market events too. In the EU, securities may be offered to the public only "after prior publication of a prospectus" (Article 3(1) of the Prospectus Regulation), and the competent authority has to approve the prospectus before it is published (Article 20(1)). BaFin checks a prospectus for completeness, coherence and comprehensibility. It does not check whether the content is correct; the issuer or offeror is liable for the information.

The secondary market is the part of the capital market in which investors trade securities that are already issued. In a secondary market transaction, the selling investor receives the money, and the issuer takes no part. Trading takes place on exchanges and other trading venues, or directly between two parties.

On an exchange, orders meet in an order book. On Xetra at the Frankfurt Stock Exchange, all orders in continuous trading are sorted "in accordance with price/time priority". Xetra also holds three auctions a day: at the start of main trading, at midday and at the end. For shares, Article 3(1) of MiFIR requires trading venues to publish "current bid and offer prices and the depth of trading interests at those prices". A buyer on the primary market can use the secondary market to sell later. How the matching works is the subject of What is an order book?

The difference is who sells and who gets the money. On the primary market the issuer sells and receives the proceeds; on the secondary market one investor sells to another. The table sets the two side by side, with examples for stocks and bonds.

A primary market for crypto is the first offer of a crypto-asset to the public, and EU law separates it from secondary trading in the same way. Under Article 4(1) of Regulation (EU) 2023/1114 (MiCA), a person may offer a crypto-asset other than an asset-referenced token or e-money token to the public only as a legal person with a crypto-asset white paper that it has drawn up and notified. MiCA applies from December 30, 2024.

Trading on a crypto-asset trading platform is the secondary market. Recital 74 of MiCA states that "the mere admission to trading or the publication of bid and offer prices should not, in and of itself, be regarded as an offer to the public of crypto-assets".

In Germany, BaFin approves securities prospectuses under the EU Prospectus Regulation. It can prohibit a public offer that breaches the regulation, the Securities Prospectus Act (WpPG) or the Capital Investment Act (VermAnlG). The EU Listing Act amends the prospectus rules, and BaFin published a supervisory notice on April 23, 2026 for prospectuses it approves from June 5, 2026. Trading at the Frankfurt Stock Exchange is supervised by the Exchange Supervisory Authority of Hesse. A company that goes public in Frankfurt chooses between the Regulated Market, an EU-regulated market with the Prime Standard and General Standard segments, and the Open Market, which the exchange organizes under private law and which includes the Scale segment. In Austria, § 13(1) of the Kapitalmarktgesetz 2019 names the FMA as the competent authority under the Prospectus Regulation.

Switzerland is outside the EU and has its own rules. Article 35 of FinSA requires a prospectus for a public offer of securities or for their admission to trading on a trading venue. Under Article 51, the prospectus goes to a reviewing body before publication, which checks that it is "complete, coherent and understandable". FINMA authorizes stock exchanges. This page gives no legal advice.