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Liquidity

Liquidity describes how readily an asset can be bought or sold in meaningful size without causing a large price change.

By Betta Signals Research Desk · Reviewed October 24, 2026

Plain-English definition: Liquidity describes how readily an asset can be bought or sold in meaningful size without causing a large price change.[1]

How the term is used

For an exchange-traded product, reported trading volume is only one liquidity measure. Bid-ask spreads and the creation-and-redemption process also affect how its shares trade.[2]

What to check before relying on it

A quoted last price may not be available for the size or time an investor wants. Thin markets can produce wide spreads, stale prints, and larger execution costs.

Example

An ETF can show modest exchange volume yet trade efficiently because market makers can access liquid underlying securities; another fund with illiquid holdings may behave differently.

Exchange-traded fund (ETF)RiskVolatility

Research last reviewed: October 24, 2026. This definition is educational and does not evaluate a particular security.

Sources

  1. Investor.gov: Liquidity (or Marketability) — the ability to buy or sell an investment quickly at a price close to the quoted market price. Accessed October 24, 2026.
  2. FINRA: Exchange-Traded Funds and Products — ETF and ETP structure, trading, costs, and product-specific risks. Accessed October 24, 2026.