{"index": {"name": "Oil & Gas Equipment & Services", "level": "industry", "country_code": "CN", "sector": "Energy", "industry": "Oil & Gas Equipment & Services", "constituent_count": 21, "latest": {"week_ending": "2026-05-29", "index_value": 1574.61898553, "weekly_return": -8.62162937, "constituents": 21, "advancing": 2, "declining": 19, "unchanged": 0, "trend_line": 1656.717062, "activity_lines": {"activity_5": 1705.795812, "activity_10": 1734.560668, "activity_20": 1762.356682, "activity_30": 1721.161805}, "fair_value": 1180.494519, "trend_signal": 1}, "summary": "For the week ending 29 May 2026, Oil & Gas Equipment & Services declined 8.62% with 2 advancing, 19 declining, and 0 unchanged constituents.", "links": {"chart": "https://sharemaestro.com/structure/cn/energy/oil-gas-equipment-services/", "api": "https://sharemaestro.com/api/structure/cn/energy/oil-gas-equipment-services/", "share_image": 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