/china-variance-commentary

name: china-variance-commentary
description: Write variance commentary for A-share fund performance and portfolio changes. Adapts the original variance-commentary skill for fund accounting and Chinese fund reporting conventions. Triggers on "基金业绩点评", "组合表现分析", "variance commentary fund", "基金表现分析", "业绩归因", or "commentary on [fund] performance".

china-variance-commentary

Purpose

Write professional **基金业绩点评** — structured variance commentary on fund performance and portfolio changes.

Data Sources

Tier 0 — 万得 Wind（最全面付费数据）

• 覆盖：A股/港美股/基金/指数/债券/宏观/研报/分析（44个工具）
• MCP 服务：`wind-mcp`（需 `WIND_API_KEY` 密钥，以 `ak_` 开头）
• 优势：全市场覆盖面最广、数据最全面、包含研报和量化分析
• 密钥申请：https://aifinmarket.wind.com.cn/#/home

Tier 1 — 同花顺 iFind（付费精确数据）/ AkShare MCP（Tier-2 免费备选）

get_fund_data(fund_code)              → Fund NAV, performance
get_quote(ticker)                     → Individual security performance
get_index_data("000001")              → Benchmark data

Secondary Sources

• 基金公司 — fund performance data
• 托管行 — custody data
• Wind / Choice — performance analytics

Workflow

Step 1: Gather Performance Data

**Performance snapshot:**

| Metric | Period | Benchmark | Active Return | |--------|--------|-----------|--------------| | 净值增长率 | X.XX% | X.XX% | X.XX% | | 年化收益率 | X.XX% | X.XX% | X.XX% | | 波动率 | X.XX% | X.XX% | | | 夏普比率 | X.XX | | | | 最大回撤 | X.XX% | | | | 卡尔马比率 | X.XX | | |

Step 2: Attribution Analysis

**Performance attribution:**

| Factor | Contribution | Description | |--------|-------------|-------------| | 资产配置 (Allocation) | X.XX% | Sector/security weight decisions | | 个股选择 (Selection) | X.XX% | Security picking within sectors | | 交互效应 (Interaction) | X.XX% | Combined effect |

Step 3: Sector Attribution

**Sector performance:**

| Sector | Weight | Return | Contribution | Benchmark Weight | Benchmark Return | Allocation Effect | Selection Effect | |--------|--------|--------|-------------|-----------------|-----------------|-----------------|-----------------| | | | | | | | | | | **Total** | **100%** | | | | | | |

Step 4: Top/Bottom Contributors

**Best/worst performers:**

| # | Security | Ticker | Weight | Period Return | Contribution | |---|----------|--------|--------|--------------|-------------| | 1 (Best) | | | | | | | 2 | | | | | | | 3 | | | | | | | ... | | | | | | | (Worst) | | | | | | | (2nd Worst) | | | | | | | (3rd Worst) | | | | | |

Step 5: Risk Analysis

**Risk metrics:**

| Metric | Value | Benchmark | Assessment | |--------|-------|-----------|-----------| | 波动率 | X.XX% | X.XX% | Higher/Lower | | 最大回撤 | X.XX% | X.XX% | | | 下行偏差 | X.XX% | X.XX% | | | VaR (95%) | X.XX% | | | | Beta | X.XX | | | | Alpha | X.XX% | | |

Step 6: Holdings Changes

**Changes since last period:**

| Action | Security | Ticker | Reason | Impact | |--------|----------|--------|--------|--------| | New buy | | | | | | Add to | | | | | | Reduce | | | | | | Sold | | | | |

Step 7: Market Context

**Market environment:**

| Factor | Current | Prior Period | Change | |--------|---------|-------------|--------| | 上证指数 | | | | | 沪深300 | | | | | 创业板指 | | | | | 北向资金 | | | | | 成交量 | | | |

Step 8: Commentary

**Standard format:**

【业绩点评】[Fund Name] [Period]
报告期：[Date]
单位净值：¥X.XXXX
净值增长率：+/-X.XX%
基准收益率：+/-X.XX%
超额收益：+/-X.XX%

一、业绩概览
   [Overall performance summary]

二、归因分析
   [Attribution breakdown]

三、行业分析
   [Sector attribution]

四、重仓股表现
   [Top/bottom contributors]

五、风险指标
   [Risk metrics]

六、持仓变动
   [Changes in portfolio]

七、市场回顾
   [Market context]

八、展望
   [Forward outlook]

China-Specific Considerations

Fund Benchmarks

| Fund Type | Typical Benchmark | |-----------|------------------| | 股票型基金 | 沪深300 / 创业板指 | | 债券型基金 | 中债综合指数 | | 混合型基金 | 沪深300 × 50% + 中债 × 50% | | 指数基金 | Tracking index | | QDII | Relevant foreign index |

Performance Presentation

| Convention | China Practice | |-----------|----------------| | Return calculation | Geometric | | Benchmark | Contractual | | Reporting frequency | Daily for public funds | | Risk metrics | Standard set |

Quality Checks

Before delivering:

• [ ] Performance data accurate
• [ ] Attribution complete
• [ ] Top/bottom contributors identified
• [ ] Risk metrics calculated
• [ ] Holdings changes documented
• [ ] Market context current
• [ ] Commentary balanced

> **Data Source Mode Switch**: Set env var `IFIND_DATA_SOURCE_MODE` to control data source preference. > - `ifind-only` (strict): Use iFind only, error if unavailable > - `ifind-fallback` (default): iFind preferred, fallback to AkShare > - `akshare-only`: Skip iFind, use AkShare only > - `wind-only`: Wind only, error if unavailable > - `wind-fallback`: Wind first, fallback to iFind → AkShare