{
    "id": "VOL-031",
    "category": "VOL",
    "title": "開市首段成交占比",
    "question": "交易活動是否集中在開市初段？",
    "chart": "line",
    "metric": "開市量占比（%）",
    "secondary": "相對歷史基線（倍）",
    "x": "交易日／觀察期",
    "y": "開市量占比（%）",
    "panels": [
        "開市首段成交占比",
        "相對歷史基線（倍）",
        "事件明細與資料日期"
    ],
    "filters": [
        "標的／市場",
        "分析區間",
        "基準／參數"
    ],
    "apis": [
        "EOD",
        "INTRADAY"
    ],
    "calculation": "首30分鐘有效bar量除當日有效時段總量；只有完整日納入。",
    "caveat": "OHLCV不能識別主動買賣、投資者身份、逐筆籌碼或真實資金淨流入。 盤中方案、市場、時段與歷史深度須按標的驗證；不假設HK與US覆蓋相同。",
    "data_class": "衍生",
    "complexity": "中",
    "audience": "進階",
    "reach": 7,
    "frequency": 8,
    "decision": 8,
    "clarity": 7,
    "sample_labels": [
        "T−5",
        "T−4",
        "T−3",
        "T−2",
        "T−1",
        "T"
    ],
    "cadence": "每日／事件觸發",
    "category_name": "成交量與流動性",
    "score": 75.5,
    "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/intraday-historical-data-api"
    ],
    "rank": 451,
    "stage": "P2",
    "svg_file": "mockups/0451-VOL-031.svg",
    "demo_fingerprint": "8c2fe789a768e6cf",
    "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
        }
    }
}