Bid-Ask Spread: Meaning, Definition & Indian Stock Market Examples

Difference between best buy price (bid) and best sell price (ask) — the cost of immediate execution.

Disclaimer: This article is for educational purposes only and does not constitute SEBI-registered investment advice. Consult a SEBI-registered investment advisor before making investment decisions.

What is Bid-Ask Spread?

The bid-ask spread is the difference between the highest price a buyer is willing to pay (bid) and the lowest price a seller is willing to accept (ask). The spread represents the immediate cost of trading — you pay the ask to buy and receive the bid to sell. Narrow spreads indicate high liquidity; wide spreads indicate low liquidity.

Bid-Ask Spread — Indian Stock Market Example

Nifty 50 futures typically have a bid-ask spread of ₹0.05–0.10 (extremely liquid). A small-cap stock with ₹5 lakh daily volume might have a bid at ₹198 and ask at ₹202 — a ₹4 spread (2% immediate cost). This is why trading small-cap stocks frequently destroys returns through transaction costs.

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Frequently Asked Questions about Bid-Ask Spread

How does a large bid-ask spread affect my returns?

Every time you buy at the ask and sell at the bid, you lose the spread. For a stock with 2% spread, you need the stock to rise at least 2% just to break even. Active traders in illiquid stocks effectively give away 2–4% per round trip to market makers — a hidden cost that significantly erodes returns over time.

How can I minimise bid-ask spread costs?

Use limit orders (set your own price) instead of market orders for illiquid stocks. Trade only highly liquid large-cap and mid-cap stocks for active strategies. Avoid trading in the first 5–10 minutes of market open when spreads are widest. For small-cap investments, hold longer to amortise the spread cost over larger price appreciation.

Related Terms

Liquidity

Ease of buying/selling an asset quickly at fair price without significantly moving the market.

Market Order

Order to buy/sell immediately at the best available market price.

Limit Order

Order to buy/sell only at a specified price or better — controls execution price.

Trading Volume

Number of shares traded in a period — confirms price move validity.

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