Market Liquidity Explained: Can You Sell When You Need To?

Market liquidity describes how easily you can buy or sell an investment at a fair market price when you want to. It is different from asking whether you like the investment's long-term prospects. An investment can be attractive to you and still be difficult to sell.

What happens when an investment is illiquid?

FINRA explains that finding a buyer can take time. You may need to accept a lower price to sell quickly, or there may be no buyer willing to meet your price. A buyer can face the opposite problem: waiting for a seller or paying more.

That makes liquidity a planning issue. If you need money for a known expense, the ability to exit matters alongside the investment's displayed value. A valuation estimate is not proof that a trade will happen at that amount.

What does the bid-ask spread tell you?

The bid is what a buyer is willing to pay, and the ask is what a seller is willing to accept. The spread is the gap between them. FINRA notes that illiquid securities often have wider spreads, which can reduce returns by increasing purchase prices or lowering sale proceeds.

A narrow spread can suggest better liquidity, but it is not the whole picture. Trading volume, order size and the participants available at different prices also matter. Liquidity can change during market stress or outside regular trading hours.

How should you use that information?

Match an investment's access characteristics to the time when you may need the money. Before buying something hard to sell, ask how an exit would work and which costs could apply.

A limit order can help you avoid accepting an unwanted price, but it cannot create a buyer. FINRA cautions that such an order may remain unfilled. Investments can lose value, and an urgent sale can make an unfavorable outcome harder to avoid.

Frequently asked questions

Does a market price guarantee I can sell at that price? No. Available buyers and the size of your order matter.

Does using a limit order remove liquidity risk? No. It controls the acceptable price but does not guarantee execution.

Sources and further reading: FINRA, Market Liquidity (https://www.finra.org/investors/insights/market-liquidity-risk).