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a-share-spread-capture

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A股价差捕获/做市策略分析。当用户说"价差捕获"、"做市策略"、"spread capture"、"买卖价差交易"、"做市商"、"报价策略"时触发。基于 cn-stock-data 获取数据,分析买卖价差特征、做市收益空间、库存风险。支持 formal/brief 两种输出风格。

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How to use this skill

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  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
Prompt to paste
I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/aifinlab/FinClaw/blob/HEAD/skills/a-share-spread-capture/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/a-share-spread-capture/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

价差捕获/做市策略分析助手

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