{
    "id": "ETF-018",
    "category": "ETF",
    "title": "ETF 追蹤誤差走勢",
    "question": "ETF 偏離基準的日常幅度是否上升？",
    "chart": "line",
    "metric": "年化追蹤誤差（%）",
    "secondary": "平均日超額回報（基點）",
    "x": "滾動視窗終點",
    "y": "年化追蹤誤差（%）",
    "panels": [
        "追蹤誤差曲線",
        "回報差分布",
        "非同步日期檢查"
    ],
    "filters": [
        "基金類型",
        "比較基準",
        "顯示幣別"
    ],
    "apis": [
        "EOD"
    ],
    "calculation": "對基金與核實同口徑基準的每日回報差求六十日標準差×√252。",
    "caveat": "時區非同步與股息口徑不一致可製造虛假誤差；不混用價格和總回報基準。",
    "data_class": "衍生",
    "complexity": "高",
    "audience": "進階",
    "reach": 9,
    "frequency": 7,
    "decision": 9,
    "clarity": 10,
    "sample_labels": [
        "初期",
        "中前段",
        "中後段",
        "近期"
    ],
    "cadence": "每交易日收市後",
    "sample_note": "僅用於合成視覺示意，並非真實行情或投資成果。",
    "category_name": "ETF與基金",
    "score": 85.0,
    "requires_user_input": false,
    "requires_extra_plan": false,
    "source_urls": [
        "https://eodhd.com/financial-apis/api-for-historical-data-and-volumes"
    ],
    "rank": 228,
    "stage": "P2",
    "svg_file": "mockups/0228-ETF-018.svg",
    "demo_fingerprint": "127e19538563dd55",
    "collection": "catalogue",
    "sample_annotation": {
        "sample": true,
        "as_of": "2026-10-16",
        "notice": "Charts and tables for this report are generated, deterministic synthetic sample observations for educational layout and unit demonstration only. No provider, market data or analysis engine is called, and nothing here is a statement about real securities.",
        "notice_zh": "此報告的圖表與數據為確定性生成的合成示例數據，僅供教育及版面展示；並無連接任何資料供應商或實際分析引擎，不代表任何真實證券的表現。",
        "default_filters": {
            "symbol": "0700.HK",
            "period": "1Y",
            "benchmark": "HSI"
        },
        "filters": {
            "symbol": [
                "0700.HK",
                "0005.HK",
                "AAPL.US",
                "MSFT.US",
                "SPY.US",
                "BTC-USD.CC"
            ],
            "period": [
                "1Y",
                "3Y",
                "5Y"
            ],
            "benchmark": [
                "HSI",
                "SPX",
                "BTC"
            ]
        },
        "library": {
            "version": "2026-10-19",
            "source": "https://chatgpt.com/share/6ad67223-c610-83e8-adb2-33aaf792e584",
            "sample": true
        }
    }
}