{
    "id": "VOL-038",
    "category": "VOL",
    "title": "拆股前後量能口徑",
    "question": "看似放量是否只是股份單位改變？",
    "chart": "line",
    "metric": "成交量（所列股數基準）",
    "secondary": "累積拆股因子（倍）",
    "x": "交易日／觀察期",
    "y": "成交量（所列股數基準）",
    "panels": [
        "供應商拆股調整量",
        "還原當時股數量",
        "拆股因子與事件"
    ],
    "filters": [
        "標的／市場",
        "分析區間",
        "基準／參數"
    ],
    "apis": [
        "EOD",
        "SPLIT",
        "FUND"
    ],
    "calculation": "EOD.volume本來已拆股調整，直接保留。定義F_t為觀察日t之後至資料基準日各次拆股的新股數／舊股數累積乘積；還原當時成交量=EOD.volume/F_t，並列兩種股數基準與F_t，不能再次乘F_t調整API成交量。",
    "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。 拆股事件及因子基準必須完整；缺失公司行動時不還原原始量。",
    "data_class": "衍生",
    "complexity": "中",
    "audience": "進階",
    "reach": 6,
    "frequency": 7,
    "decision": 7,
    "clarity": 6,
    "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": 65.5,
    "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/api-splits-dividends",
        "https://eodhd.com/financial-apis/stock-etfs-fundamental-data-feeds"
    ],
    "rank": 718,
    "stage": "P3",
    "svg_file": "mockups/0718-VOL-038.svg",
    "demo_fingerprint": "3fddca077e0674a0",
    "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
        }
    }
}