Seasoned Security is a financial instrument that has been traded in the secondary market long enough to establish a positive reputation for liquidity and trade volume. Newly-listed securities may show substantial volatility when they are first introduced to the market. Seasoned securities have already eliminated the short-term effects from their initial public offering, therefore they tend to have more stable prices on the secondary market.
Additional meaning of Seasoned Security:
In the Euromarket a security that has been issued and actively traded for a minimum of 40 days is referred to as seasoned security. Certain US investors are not allowed to trade in Euromarket securities before they have been traded for 40 days or longer.