{"index": {"name": "Copper", "level": "industry", "country_code": "CN", "sector": "Basic Materials", "industry": "Copper", "constituent_count": 15, "latest": {"week_ending": "2026-07-17", "index_value": 2581.83922718, "weekly_return": -9.66575407, "constituents": 15, "advancing": 1, "declining": 14, "unchanged": 0, "trend_line": 2857.242951, "activity_lines": {"activity_5": 2911.44058, "activity_10": 3043.06693, "activity_20": 2997.732332, "activity_30": 2939.912382}, "fair_value": 1687.936667, "trend_signal": 1}, "summary": "For the week ending 17 July 2026, Copper declined 9.67% with 1 advancing, 14 declining, and 0 unchanged constituents.", "links": {"chart": "https://sharemaestro.com/structure/cn/basic-materials/copper/", "api": "https://sharemaestro.com/api/structure/cn/basic-materials/copper/", "share_image": "https://sharemaestro.com/structure/cn/basic-materials/copper/share-image.svg"}}, "available": true, "methodology": {"country_code": "CN", "asset_type": "equity", 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