{"index": {"name": "Financial Services", "level": "sector", "country_code": "KR", "sector": "Financial Services", "industry": "", "constituent_count": 61, "latest": {"week_ending": "2026-05-29", "index_value": 3109.46642826, "weekly_return": -7.10635114, "constituents": 61, "advancing": 2, "declining": 58, "unchanged": 1, "trend_line": 3016.726637, "activity_lines": {"activity_5": 3292.094161, "activity_10": 3342.12376, "activity_20": 3341.582155, "activity_30": 3212.561769}, "fair_value": 1943.232968, "trend_signal": 1}, "summary": "For the week ending 29 May 2026, Financial Services declined 7.11% with 2 advancing, 58 declining, and 1 unchanged constituents.", "links": {"chart": "https://sharemaestro.com/structure/kr/financial-services/", "api": "https://sharemaestro.com/api/structure/kr/financial-services/", "share_image": "https://sharemaestro.com/structure/kr/financial-services/share-image.svg"}}, "available": true, "methodology": {"country_code": "KR", "asset_type": "equity", 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