{
    "id": "OPT-009",
    "category": "OPT",
    "title": "期權買賣價差排行",
    "question": "哪些合約交易摩擦較低？",
    "chart": "bar",
    "metric": "買賣價差／中價（%）",
    "secondary": "買賣掛單量與合約成交量",
    "x": "合約",
    "y": "買賣價差／中價（%）",
    "panels": [
        "主圖：買賣價差／中價（%），依合約排列",
        "輔圖：買賣掛單量與合約成交量",
        "明細：期權買賣價差排行的資料列、觀測日期與缺值狀態"
    ],
    "filters": [
        "美股標的與報價日",
        "到期日與行權價",
        "最小中價及掛單量"
    ],
    "apis": [
        "OPTIONS"
    ],
    "calculation": "以 (ask-bid)/midpoint 排序，只保留 ask≥bid≥0且midpoint>0 的快照。",
    "caveat": "日終掛單不保證可按該價成交；掛單量可能迅速變化。 Marketplace 額外方案；僅美股日終快照，不含逐筆買賣方向或券商庫存；先驗證合約乘數。",
    "data_class": "額外方案",
    "complexity": "中",
    "audience": "進階",
    "reach": 7,
    "frequency": 8,
    "decision": 9,
    "clarity": 9,
    "sample_labels": [
        "低摩擦",
        "中等摩擦",
        "高摩擦",
        "無有效雙邊價"
    ],
    "cadence": "美股收市後日更",
    "category_name": "美股期權",
    "score": 80.0,
    "requires_user_input": false,
    "requires_extra_plan": true,
    "source_urls": [
        "https://eodhd.com/marketplace/unicornbay/options"
    ],
    "rank": 329,
    "stage": "P2",
    "svg_file": "mockups/0329-OPT-009.svg",
    "demo_fingerprint": "13e542599cdf7f16",
    "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
        }
    }
}