Market liquidity refers to how easily assets can be bought or sold in a market without causing significant price changes. High liquidity means that there are many buyers and sellers, allowing transactions to occur quickly and at stable prices. Examples of highly liquid markets include major stock exchanges like the New York Stock Exchange. In contrast, low liquidity occurs when there are fewer participants, making it harder to execute trades without affecting the asset's price. This can happen in niche markets or with less popular assets, such as certain real estate properties or collectibles, where finding a buyer may take longer and require price concessions.