Bid-ask spread and liquidity

Plain-language meaning

Bid-ask spread is the price difference between best buy and sell offers, reflecting market liquidity and execution friction.

Why it is useful

Bid-ask spread and liquidity is useful as descriptive evidence when it is compared on the same definition, source, period, unit and exact listing. It is one input to research, not a verdict.

Where it appears in XMarketRadar

Look for Bid-ask spread and liquidity on Market Details, quotes, order/price context, watchlists and screener result columns when the selected provider supplies the field.

How it is calculated or sourced

Spread = ask − bid; percentage spread = (ask − bid) / ((ask + bid) / 2) × 100. Effective spread compares trade execution price to quote midpoint: 2 × |trade price − midpoint|. Depth sums displayed quantities across order book tiers.

Inputs, period and unit

Read the disclosed inputs or source, observation period, bar interval, unit, native currency and scale. A value without its source and as-of context is incomplete; unlike units must not be combined.

Worked example

Illustrative only: If a large-cap stock quotes bid ₹1,000.00 (5,000 shares) and ask ₹1,000.05 (4,000 shares), the spread is ₹0.05 (0.005%). A micro-cap quoting bid ₹48.00 (100 shares) and ask ₹51.00 (50 shares) has a ₹3.00 (6.06%) spread, reflecting significantly lower liquidity and higher transaction friction.

What high and low mean

A higher or lower Bid-ask spread and liquidity value is descriptive, not automatically good or bad. Meaning depends on the instrument, comparison period, method and related evidence.

Positive, negative and genuine zero

Positive and negative Bid-ask spread and liquidity values retain the definition shown here. A genuine reported or computed zero is displayed as 0 and is not the same as missing evidence.

When it is unavailable

Unavailable (—) means Bid-ask spread and liquidity is absent, unsupported, stale under the screen's rules or not computable from verified inputs. It must never be converted to zero or a neutral signal.

Limitations and common mistakes

Bid-ask spread and liquidity may differ by provider definition, observation time, instrument and venue. Common mistakes are dropping units or dates, comparing unlike scopes, and treating a missing value as zero.

Market-specific differences

The concept is used across all supported markets, but currency, price scale, session calendar, source field and regulatory definition can differ. XMarketRadar preserves the exact exchange context.

Related terms

Use the related-term links on this page to compare Bid-ask spread and liquidity with neighbouring definitions while retaining each term's distinct source, unit and limitations.

Suggested next steps

Open the related Market structure terms below, then follow the matching Help Centre task guide and inspect Bid-ask spread and liquidity on an exact exchange listing. Confirm source, as-of time, units and unavailable reason before using it in research.

Educational information only; not investment advice or an order service.

This Bid-ask spread and liquidity tutorial is educational and descriptive. It is not investment advice, a price prediction, a recommendation, or an instruction to buy, sell, rebalance or place an order.