{"index": {"name": "Aluminum", "level": "industry", "country_code": "CN", "sector": "Basic Materials", "industry": "Aluminum", "constituent_count": 36, "latest": {"week_ending": "2026-05-29", "index_value": 2614.04390059, "weekly_return": -3.19004812, "constituents": 36, "advancing": 8, "declining": 28, "unchanged": 0, "trend_line": 2594.741094, "activity_lines": {"activity_5": 2677.113387, "activity_10": 2693.376765, "activity_20": 2690.493077, "activity_30": 2660.634983}, "fair_value": 1882.567627, "trend_signal": 1}, "summary": "For the week ending 29 May 2026, Aluminum declined 3.19% with 8 advancing, 28 declining, and 0 unchanged constituents.", "links": {"chart": "https://sharemaestro.com/structure/cn/basic-materials/aluminum/", "api": "https://sharemaestro.com/api/structure/cn/basic-materials/aluminum/", "share_image": "https://sharemaestro.com/structure/cn/basic-materials/aluminum/share-image.svg"}}, "available": true, "methodology": {"country_code": "CN", "asset_type": 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