价差捕获/做市策略分析助手

SkillDev tools

This skill gives your AI the ability to analyze bid-ask spread capture and market-making strategies for A-share stocks. With it, your AI can examine spread characteristics, estimate the profit potential of quoting strategies, and weigh the inventory risk involved. Results can be delivered in a formal or a brief style.

Available today. Use it from your connected AI after setup.

After adding it, ask your AI to analyze a spread capture or market-making strategy for A-share stocks, saying something like 'spread capture' or 'quoting strategy' to bring it into play. Mention whether you want a formal or a brief write-up.

Then ask your AI: use the 价差捕获/做市策略分析助手 skill

What your AI can do with it

  • Analyze bid-ask spread characteristics for A-share stocks
  • Estimate the profit potential of a market-making strategy
  • Assess inventory risk tied to spread capture trading
  • Draw on A-share market data through cn-stock-data
  • Format answers in either a formal or a brief style

What this skill tells your AI

The instructions your AI receives, as published by aifinlab/finclaw in skills/a-share-spread-capture/SKILL.md and read by ahel’s review.

数据获取

通过 cn-stock-data skill 获取数据:

  • 盘口数据: 多档买卖报价与挂单量
  • 逐笔成交: 成交方向与价格
  • 实时行情: 最新价差与成交量

分析工作流

Step 1: 价差特征分析

  • 报价价差 (quoted spread) = Ask1 - Bid1
  • 有效价差 (effective spread) = 2|P_trade - Midpoint|
  • 已实现价差 (realized spread) = 做市商实际利润
  • 价差的日内模式:U型曲线(开盘/收盘宽,盘中窄)

Step 2: 做市收益空间评估

  • 毛利润 = 报价价差 × 成交量 / 2
  • 净利润 = 毛利润 - 逆向选择成本 - 库存成本
  • 逆向选择成本 = 有效价差 - 已实现价差
  • 不同市值/流动性股票的做市收益对比

Step 3: 库存风险管理

  • 库存偏离度:当前持仓 vs 目标持仓
  • 库存半衰期:回归目标持仓的速度
  • 价格风险:持仓期间的价格波动损失
  • A股T+1限制对做市库存管理的影响

Step 4: 最优报价策略

  • Avellaneda-Stoikov 模型:基于库存的最优报价
  • 报价宽度随波动率/库存动态调整
  • 挂单深度优化:各价位的最优挂单量
  • A股特征:涨跌停附近的报价策略调整

Step 5: 输出报告

输出格式

formal 风格(研报级)

# [标的] 价差捕获/做市分析报告

## 一、价差特征
| 指标 | 数值 | 日均 |
|------|------|------|
| 报价价差 | 0.05% | 0.06% |

## 二、做市收益空间
[毛利润、净利润、逆向选择成本]

## 三、库存风险
[库存偏离、半衰期、价格风险]

## 四、报价策略建议
[最优报价宽度、挂单深度]

brief 风格(快速分析)

## [标的] 做市分析速览
- 报价价差 0.05%,有效价差 0.04%
- 逆向选择成本占比 35%
- 日均做市毛利空间约 2.1 万
- 库存半衰期 15 分钟,风险可控

参考 references/spread-capture-guide.md 获取详细方法论与 A股实证研究。

使用示例

示例 1: 基本使用

# 调用 skill
result = run_skill({
    "param1": "value1",
    "param2": "value2"
})

示例 2: 命令行使用

python scripts/run_skill.py --input data.json

Signals

GitHub stars
241
Forks
38
Last commit
May 2026
Advanced
Catalog kind
skill
Gateway key
a-share-spread-capture
Source
github.com/aifinlab/finclaw