2026-08-21 13:00｜有色金属事件流（1条）

[
  {
    "event_id": "smm-cu-20260821-spot_basis",
    "title": "SMM铜升贴水均价较上个更新日下跌75元/吨",
    "event_type": "spot_basis",
    "event_time_quality": "day_only",
    "event_time_utc": null,
    "published_at_utc": "2026-08-21T03:07:00Z",
    "asset_keys": ["NONFERROUS"],
    "direction_score": {"NONFERROUS": 0},
    "confidence": 86,
    "horizon": "intraday",
    "raw_facts": {
      "publisher": "上海有色（SMM）",
      "source_title": "8月21日SMM 1#电解铜及升贴水",
      "market": "SMM 1#电解铜现货",
      "metal": "铜",
      "grade": "1#电解铜",
      "observation_date": "2026-08-21",
      "source_published_time_local": "2026-08-21 11:07 Asia/Shanghai",
      "unit": "元/吨",
      "spot_average_change": 400.00,
      "spot_average_change_reference": "相较上个更新日同口径均价",
      "spot_basis_average_change": -75.00,
      "spot_basis_average_change_reference": "相较上个更新日同口径升贴水均价",
      "basis_definition": "详情页列为SMM 1#电解铜升贴水；页面未公开绝对升贴水值、比较合约月份和基准价",
      "grade_breakdown": {
        "平水铜": {"spot_average_change": 400.00, "spot_basis_average_change": -75.00},
        "升水铜": {"spot_average_change": 405.00, "spot_basis_average_change": -70.00},
        "贵溪铜": {"spot_average_change": 445.00, "spot_basis_average_change": -30.00},
        "湿法铜": {"spot_average_change": 360.00, "spot_basis_average_change": -115.00}
      },
      "absolute_value_status": "详情页公开正文仅披露相较上个更新日的差值，绝对报价区间和均价需登录后查看"
    },
    "transmission_chain": "SMM公开差值显示1#电解铜现货均价上涨400元/吨、升贴水均价下跌75元/吨→现货绝对价格与升贴水变动方向相反，页面未公开绝对升贴水水平→两项指标对NONFERROUS的方向信号不一致，综合方向保持中性。",
    "invalidation_conditions": "SMM后续修订本期差值；或下一更新日同口径升贴水均价较上个更新日上涨75元/吨以上，使本期-75元/吨的边际走弱完全反转。",
    "source_urls": [
      "https://hq.smm.cn/copper/content/104071670"
    ],
    "source_tier": "B"
  }
]