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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