---
type: "Learn"
title: "买卖价差"
locale: "en"
url: "https://longbridge.com/en/learn/bid-ask-spread-100758.md"
parent: "https://longbridge.com/en/learn.md"
datetime: "2026-04-08T14:36:16.943Z"
locales:
  - [en](https://longbridge.com/en/learn/bid-ask-spread-100758.md)
  - [zh-CN](https://longbridge.com/zh-CN/learn/bid-ask-spread-100758.md)
  - [zh-HK](https://longbridge.com/zh-HK/learn/bid-ask-spread-100758.md)
---

# 买卖价差

A bid-ask spread is the amount by which the ask price exceeds the bid price for an asset in the market. The bid-ask spread is essentially the difference between the highest price that a buyer is willing to pay for an asset and the lowest price that a seller is willing to accept.An individual looking to sell will receive the bid price while one looking to buy will pay the ask price.

## Definition

The bid-ask spread refers to the amount by which the ask price exceeds the bid price in the market. Essentially, it is the difference between the highest price a buyer is willing to pay for an asset and the lowest price a seller is willing to accept. An individual looking to sell will receive the bid price, while an individual looking to buy will pay the ask price.

## Origin

The concept of the bid-ask spread originated from early trading activities in financial markets. As markets evolved, the bid-ask spread became an important indicator of market liquidity and transaction costs. Historically, with the advent of electronic trading platforms, bid-ask spreads have narrowed, reflecting increased market efficiency.

## Categories and Features

The bid-ask spread can be categorized based on market type and asset class. In the stock market, highly liquid stocks typically have smaller bid-ask spreads, while less liquid stocks may have larger spreads. In the forex market, major currency pairs usually have smaller bid-ask spreads, whereas less frequently traded currency pairs may have larger spreads. The size of the bid-ask spread generally reflects the market's liquidity and risk level.

## Case Studies

A typical case is the stock of Apple Inc. In highly liquid markets, Apple's stock usually has a small bid-ask spread, meaning investors can trade at costs close to the market price. Another example is a small tech company, whose stock may have a larger bid-ask spread due to lower liquidity, increasing transaction costs and risk.

## Common Issues

Investors may encounter issues such as how to reduce transaction costs in markets with high bid-ask spreads and how to exploit spreads for arbitrage opportunities. A common misconception is that bid-ask spreads are always fixed, whereas they actually vary with market conditions and asset liquidity.