{"index": {"name": "Chemicals", "level": "industry", "country_code": "KR", "sector": "Basic Materials", "industry": "Chemicals", "constituent_count": 29, "latest": {"week_ending": "2026-05-29", "index_value": 1564.29979189, "weekly_return": -7.17672958, "constituents": 29, "advancing": 2, "declining": 27, "unchanged": 0, "trend_line": 1614.988521, "activity_lines": {"activity_5": 1681.26895, "activity_10": 1722.348905, "activity_20": 1706.028662, "activity_30": 1668.859836}, "fair_value": 1415.621765, "trend_signal": 1}, "summary": "For the week ending 29 May 2026, Chemicals declined 7.18% with 2 advancing, 27 declining, and 0 unchanged constituents.", "links": {"chart": "https://sharemaestro.com/structure/kr/basic-materials/chemicals/", "api": "https://sharemaestro.com/api/structure/kr/basic-materials/chemicals/", "share_image": "https://sharemaestro.com/structure/kr/basic-materials/chemicals/share-image.svg"}}, "available": true, "methodology": {"country_code": "KR", "asset_type": 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