{"stock_code": "300509", "stock_name": "新美星", "market_type": "A", "analysis_date": "2026-03-19T11:41:21.140257", "structure_snapshot": {"structure_type": "downtrend", "ma200_position": "above", "phase": "unclear", "key_levels": [{"price": 17.0, "label": "近期高点1（2026-01-28）"}, {"price": 16.63, "label": "近期高点2（2026-01-09）"}, {"price": 14.5, "label": "双顶形态颈线"}, {"price": 13.06, "label": "近期低点（2026-03-04）"}, {"price": 12.66, "label": "当前价格"}, {"price": 11.1, "label": "MA200"}], "trend_description": "