{
    "id": "ETF-043",
    "category": "ETF",
    "title": "ETF 相關性是否漂移",
    "question": "曾經互補的兩隻 ETF 最近是否開始同升同跌？",
    "chart": "line",
    "metric": "滾動相關係數（−1 至 1）",
    "secondary": "共同有效交易日（天）",
    "x": "滾動視窗終點",
    "y": "滾動相關係數（−1 至 1）",
    "panels": [
        "滾動相關",
        "視窗樣本量",
        "非同步檢查"
    ],
    "filters": [
        "基金類型",
        "比較基準",
        "顯示幣別"
    ],
    "apis": [
        "EOD",
        "FX"
    ],
    "calculation": "同幣別每日調整後回報計算九十日 Pearson 相關，缺失天數超標即不出值。",
    "caveat": "不同交易時區會扭曲相關；需要同步收市或改週頻，相關不代表因果。",
    "data_class": "衍生",
    "complexity": "高",
    "audience": "進階",
    "reach": 6,
    "frequency": 4,
    "decision": 6,
    "clarity": 10,
    "sample_labels": [
        "早期",
        "中期",
        "後期",
        "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": 58.0,
    "requires_user_input": false,
    "requires_extra_plan": false,
    "source_urls": [
        "https://eodhd.com/financial-apis/api-for-historical-data-and-volumes",
        "https://eodhd.com/financial-apis/list-supported-forex-currencies"
    ],
    "rank": 843,
    "stage": "P4",
    "svg_file": "mockups/0843-ETF-043.svg",
    "demo_fingerprint": "6a4bf6d6df906fb4",
    "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
        }
    }
}