{
    "id": "ETF-027",
    "category": "ETF",
    "title": "ETF 與組合互補度",
    "question": "哪隻候選 ETF 與現有組合較少同升同跌？",
    "chart": "scatter",
    "metric": "候選與組合相關係數（−1 至 1）",
    "secondary": "納入後歷史波動變動（百分點）",
    "x": "候選 ETF",
    "y": "候選與組合相關係數（−1 至 1）",
    "panels": [
        "相關與波動變化",
        "候選取代權重",
        "共同樣本"
    ],
    "filters": [
        "基金類型",
        "比較基準",
        "自訂設定"
    ],
    "apis": [
        "EOD",
        "USER"
    ],
    "calculation": "由現有用戶組合每日加權回報計算候選相關，按設定投入權重重估歷史波動。",
    "caveat": "需明示當前權重回溯只是情境；相關會變，不能以此承諾未來分散效果。",
    "data_class": "用戶資料",
    "complexity": "高",
    "audience": "進階",
    "reach": 8,
    "frequency": 6,
    "decision": 8,
    "clarity": 8,
    "sample_labels": [
        "候選甲",
        "候選乙",
        "候選丙",
        "候選丁"
    ],
    "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": 74.0,
    "requires_user_input": true,
    "requires_extra_plan": false,
    "source_urls": [
        "https://eodhd.com/financial-apis/api-for-historical-data-and-volumes"
    ],
    "rank": 495,
    "stage": "P2",
    "svg_file": "mockups/0495-ETF-027.svg",
    "demo_fingerprint": "33ed02bf7664fb65",
    "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
        }
    }
}