{
    "id": "RSK-029",
    "category": "RSK",
    "title": "半方差與總方差",
    "question": "波動主要來自向上還是向下變化？",
    "chart": "stacked",
    "metric": "波動平方（%²）",
    "secondary": "有效樣本數（筆）",
    "x": "交易日／觀察期",
    "y": "波動平方（%²）",
    "panels": [
        "半方差與總方差",
        "有效樣本數（筆）",
        "事件明細與資料日期"
    ],
    "filters": [
        "標的／市場",
        "分析區間",
        "基準／參數"
    ],
    "apis": [
        "EOD"
    ],
    "calculation": "相同目標下把偏差平方依正負分組除全部N，使兩部分可加總。",
    "caveat": "統計估計依歷史窗口而變，缺失保留N/A；研究型價格不能視作交易執行報價。",
    "data_class": "衍生",
    "complexity": "高",
    "audience": "專業",
    "reach": 5,
    "frequency": 4,
    "decision": 6,
    "clarity": 4,
    "sample_labels": [
        "T−5",
        "T−4",
        "T−3",
        "T−2",
        "T−1",
        "T"
    ],
    "cadence": "每日／事件觸發",
    "category_name": "風險與回撤",
    "score": 48.5,
    "requires_user_input": false,
    "requires_extra_plan": false,
    "source_urls": [
        "https://eodhd.com/financial-apis/api-for-historical-data-and-volumes"
    ],
    "rank": 962,
    "stage": "P4",
    "svg_file": "mockups/0962-RSK-029.svg",
    "demo_fingerprint": "7a348eca13efbc7b",
    "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
        }
    }
}