{
  "schema_version": "1.0.0",
  "dataset_id": "cww-memory-operating-pulse",
  "title": {
    "zh": "存储产业运行脉冲",
    "en": "Memory Operating Pulse"
  },
  "subtitle": {
    "zh": "公开公司披露构成的可审计信号层；不是现货价格指数，也不是订单簿。",
    "en": "An auditable signal layer built from public company disclosures; not a spot-price index or order book."
  },
  "published_at": "2026-07-16",
  "data_as_of": "2026-02-12",
  "scope": {
    "index_universe": "agnostic",
    "compatible_contexts": ["CWW", "CWWCN"],
    "index_methodology_input": false,
    "coverage_start": "2024-08-29",
    "coverage_end": "2025-12-31",
    "languages": ["zh", "en"],
    "notes": {
      "zh": "本数据集不改变 CWW 或 CWWCN 的成分、权重或指数点位。公司收入加速度仅为经营脉冲，不代表 DRAM、NAND 或 HBM 报价的二阶导。",
      "en": "This dataset does not change CWW or CWWCN constituents, weights, or index levels. Issuer-revenue acceleration is an operating pulse, not a second derivative of DRAM, NAND, or HBM prices."
    }
  },
  "formula_registry": {
    "SOURCE_REPORTED_V1": {
      "expression": "none",
      "description": "Value or label is transcribed from the cited issuer disclosure."
    },
    "NO_DERIVATION_V1": {
      "expression": "none",
      "description": "Qualitative source label is preserved; no numeric midpoint, bound, or interpolation is inferred."
    },
    "LOG_GROWTH_V1": {
      "expression": "g_t = 100 * (ln(X_t) - ln(X_t-1))",
      "description": "Log growth in percent, computed only from exact, positive, same-issuer, same-scope, same-unit quarterly values."
    },
    "ACCELERATION_PP_V1": {
      "expression": "a_t = g_t - g_t-1",
      "description": "Change in log-growth rate, in percentage points; requires three consecutive exact comparable observations."
    }
  },
  "coverage_status": [
    {
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "status": "public_issuer_proxy_available",
      "numeric_price_series": false,
      "numeric_order_series": false,
      "acceleration_status": "not_computed",
      "reason": {
        "zh": "南亚科技按季度披露 DRAM ASP 与位元出货的方向性标签，但未给出可连续计算的精确价格或订单数。HBM 在相关期间仍被描述为开发项目，因此该序列仅作为传统 DRAM 公司代理；不推断标签中点。",
        "en": "Nanya reports directional quarterly DRAM ASP and bit-shipment labels, but not exact continuous prices or order counts. HBM was described as a development activity during the covered period, so this is only a conventional-DRAM issuer proxy; label midpoints are not inferred."
      }
    },
    {
      "family": "nand",
      "product": "nand_flash",
      "status": "public_issuer_proxy_available",
      "numeric_price_series": false,
      "numeric_order_series": false,
      "acceleration_status": "not_computed",
      "reason": {
        "zh": "铠侠按季度披露美元口径 ASP 与位元增长的方向性标签，但未给出可公开重发的连续合约价、现货价或订单簿。",
        "en": "Kioxia reports directional quarterly USD-basis ASP and bit-growth labels, but not a continuous public contract-price, spot-price, or order-book series."
      }
    },
    {
      "family": "hbm_visibility",
      "product": "hbm",
      "status": "event_series_only",
      "numeric_price_series": false,
      "numeric_order_series": false,
      "acceleration_status": "not_computed",
      "reason": {
        "zh": "公开披露支持供给售罄、客户送样、收入里程碑和同比/环比方向等事件，但不存在连续、权威、可公开再分发的 HBM 价格或订单序列。",
        "en": "Public disclosures support events such as allocated supply, customer sampling, revenue milestones, and directional growth, but no continuous authoritative public HBM price or order series is available for redistribution."
      }
    },
    {
      "family": "company_fundamentals",
      "product": "issuer_total",
      "status": "exact_public_values_available",
      "numeric_price_series": false,
      "numeric_order_series": false,
      "acceleration_status": "available_for_exact_revenue_only",
      "reason": {
        "zh": "只对同一发行人、同一口径、同一币种的精确季度收入计算对数增长和增长加速度。",
        "en": "Log growth and growth acceleration are computed only for exact quarterly revenue values with the same issuer, scope, and currency."
      }
    },
    {
      "family": "excluded_third_party_feeds",
      "product": "dram_nand_hbm_market_data",
      "status": "no_values_ingested",
      "numeric_price_series": false,
      "numeric_order_series": false,
      "acceleration_status": "not_applicable",
      "reason": {
        "zh": "Massive 的公开文档描述股票 OHLCV，而非实体 DRAM/NAND/HBM 报价；TrendForce/DRAMeXchange 历史价格属于会员数据。本公开文件不包含两者的数值。",
        "en": "Massive's public documentation covers equity OHLCV rather than physical DRAM/NAND/HBM quotes; TrendForce/DRAMeXchange historical prices are membership data. No numeric values from either provider are included here."
      },
      "reference_urls": [
        "https://massive.com/docs/rest/stocks/aggregates/custom-bars",
        "https://www.trendforce.com/membership"
      ]
    }
  ],
  "sources": [
    {
      "source_id": "NANYA_2025Q1",
      "issuer": "Nanya Technology Corporation",
      "published_at": "2025-04-10",
      "title": "Nanya Technology Reports Results for the First Quarter 2025",
      "url": "https://www.nanya.com/en/IR/16/?IRId=9012",
      "source_type": "issuer_ir_press_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "NANYA_2025Q2",
      "issuer": "Nanya Technology Corporation",
      "published_at": "2025-07-10",
      "title": "Nanya Technology Reports Results for the Second Quarter 2025",
      "url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=10032",
      "source_type": "issuer_ir_press_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "NANYA_2025Q3",
      "issuer": "Nanya Technology Corporation",
      "published_at": "2025-10-13",
      "title": "Nanya Technology Reports Results for the Third Quarter 2025",
      "url": "https://www.nanya.com/en/IR/16?IRId=10046",
      "source_type": "issuer_ir_press_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "NANYA_2025Q4",
      "issuer": "Nanya Technology Corporation",
      "published_at": "2026-01-19",
      "title": "Nanya Technology Reports Results for the Fourth Quarter 2025",
      "url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=11068",
      "source_type": "issuer_ir_press_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "KIOXIA_FY2024Q3",
      "issuer": "Kioxia Holdings Corporation",
      "published_at": "2025-02-14",
      "title": "Third Quarter of FY2024 Financial Results",
      "url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/173236/00.pdf",
      "source_type": "issuer_ir_results_presentation",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "KIOXIA_FY2024Q4",
      "issuer": "Kioxia Holdings Corporation",
      "published_at": "2025-05-15",
      "title": "FY2024 Financial Results",
      "url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/178991/00.pdf",
      "source_type": "issuer_ir_results_presentation",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "KIOXIA_FY2025Q1",
      "issuer": "Kioxia Holdings Corporation",
      "published_at": "2025-08-08",
      "title": "First Quarter of FY2025 Financial Results",
      "url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/184260/00.pdf",
      "source_type": "issuer_ir_results_presentation",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "KIOXIA_FY2025Q2",
      "issuer": "Kioxia Holdings Corporation",
      "published_at": "2025-11-13",
      "title": "Second Quarter of FY2025 Financial Results",
      "url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/191213/00.pdf",
      "source_type": "issuer_ir_results_presentation",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "KIOXIA_FY2025Q3",
      "issuer": "Kioxia Holdings Corporation",
      "published_at": "2026-02-12",
      "title": "Third Quarter of FY2025 Financial Results",
      "url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/198228/00.pdf",
      "source_type": "issuer_ir_results_presentation",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_FY2024Q4_REMARKS",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2024-09-25",
      "title": "Fiscal Q4 2024 Earnings Call Prepared Remarks",
      "url": "https://investors.micron.com/static-files/5890f96b-bf35-4c4d-b8b8-b9d0f9ed63e4",
      "source_type": "issuer_ir_prepared_remarks",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_FY2025Q1_REMARKS",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2024-12-18",
      "title": "Fiscal Q1 2025 Earnings Call Prepared Remarks",
      "url": "https://investors.micron.com/static-files/21b50828-dd30-429f-9502-b1ebc452c6e3",
      "source_type": "issuer_ir_prepared_remarks",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_FY2025Q2_REMARKS",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2025-03-20",
      "title": "Fiscal Q2 2025 Earnings Call Prepared Remarks",
      "url": "https://investors.micron.com/static-files/52ce0c07-49dc-4eab-b1d2-a67bde373bca",
      "source_type": "issuer_ir_prepared_remarks",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_FY2025Q2_RESULTS",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2025-03-20",
      "title": "Micron Technology, Inc. Reports Results for the Second Quarter of Fiscal 2025",
      "url": "https://investors.micron.com/news-releases/news-release-details/micron-technology-inc-reports-results-second-quarter-fiscal-2025",
      "source_type": "issuer_ir_results_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_FY2025Q3_RESULTS",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2025-06-25",
      "title": "Micron Technology, Inc. Reports Results for the Third Quarter of Fiscal 2025",
      "url": "https://investors.micron.com/news-releases/news-release-details/micron-technology-inc-reports-results-third-quarter-fiscal-2025",
      "source_type": "issuer_ir_results_release",
      "license_class": "issuer_ir_public_factual_extract"
    },
    {
      "source_id": "MICRON_HBM4_SAMPLES",
      "issuer": "Micron Technology, Inc.",
      "published_at": "2025-06-10",
      "title": "Micron Ships HBM4 to Key Customers to Power Next-Gen AI Platforms",
      "url": "https://investors.micron.com/news-releases/news-release-details/micron-ships-hbm4-key-customers-power-next-gen-ai-platforms",
      "source_type": "issuer_ir_product_release",
      "license_class": "issuer_ir_public_factual_extract"
    }
  ],
  "observations": [
    {
      "metric_id": "NANYA_REVENUE_2025Q1",
      "series_id": "NANYA_QUARTERLY_REVENUE",
      "family": "company_fundamentals",
      "product": "issuer_total",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-03-31",
      "published_at": "2025-04-10",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Quarterly sales revenue",
      "lower": 7188,
      "upper": 7188,
      "unit": "TWD million",
      "source_id": "NANYA_2025Q1",
      "source_url": "https://www.nanya.com/en/IR/16/?IRId=9012",
      "source_locator": "release body; quarterly sales revenue",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "SOURCE_REPORTED_V1",
      "scope_note": "Issuer total; unaudited; not a pure conventional-DRAM price or order metric.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_ASP_QOQ_2025Q1",
      "series_id": "NANYA_CONV_DRAM_ASP_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-03-31",
      "published_at": "2025-04-10",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "ASP decreased by low-single digit percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q1",
      "source_url": "https://www.nanya.com/en/IR/16/?IRId=9012",
      "source_locator": "release body; Q1 2025 ASP",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only. HBM was described as development activity during the covered period; no numeric midpoint inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_BIT_QOQ_2025Q1",
      "series_id": "NANYA_CONV_DRAM_BIT_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-03-31",
      "published_at": "2025-04-10",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "Bit shipment increased by high-single digit percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q1",
      "source_url": "https://www.nanya.com/en/IR/16/?IRId=9012",
      "source_locator": "release body; Q1 2025 bit shipment",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only; no numeric midpoint inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_REVENUE_2025Q2",
      "series_id": "NANYA_QUARTERLY_REVENUE",
      "family": "company_fundamentals",
      "product": "issuer_total",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-06-30",
      "published_at": "2025-07-10",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Quarterly sales revenue",
      "lower": 10526,
      "upper": 10526,
      "unit": "TWD million",
      "source_id": "NANYA_2025Q2",
      "source_url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=10032",
      "source_locator": "release body; quarterly sales revenue",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "SOURCE_REPORTED_V1",
      "scope_note": "Issuer total; unaudited; not a pure conventional-DRAM price or order metric.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_ASP_QOQ_2025Q2",
      "series_id": "NANYA_CONV_DRAM_ASP_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-06-30",
      "published_at": "2025-07-10",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "ASP decreased by mid-single digit percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q2",
      "source_url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=10032",
      "source_locator": "release body; Q2 2025 ASP",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only; no numeric midpoint inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_BIT_QOQ_2025Q2",
      "series_id": "NANYA_CONV_DRAM_BIT_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-06-30",
      "published_at": "2025-07-10",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "Bit shipment increased by approximately seventies percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q2",
      "source_url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=10032",
      "source_locator": "release body; Q2 2025 bit shipment",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only; the source's wording is retained and no numeric midpoint inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_REVENUE_2025Q3",
      "series_id": "NANYA_QUARTERLY_REVENUE",
      "family": "company_fundamentals",
      "product": "issuer_total",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-09-30",
      "published_at": "2025-10-13",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Quarterly sales revenue",
      "lower": 18779,
      "upper": 18779,
      "unit": "TWD million",
      "source_id": "NANYA_2025Q3",
      "source_url": "https://www.nanya.com/en/IR/16?IRId=10046",
      "source_locator": "release body; quarterly sales revenue",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "SOURCE_REPORTED_V1",
      "scope_note": "Issuer total; unaudited; not a pure conventional-DRAM price or order metric.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_ASP_QOQ_2025Q3",
      "series_id": "NANYA_CONV_DRAM_ASP_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-09-30",
      "published_at": "2025-10-13",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "ASP increased by forties percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q3",
      "source_url": "https://www.nanya.com/en/IR/16?IRId=10046",
      "source_locator": "release body; Q3 2025 ASP",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only; customized HBM was described as in development, and no numeric midpoint is inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_BIT_QOQ_2025Q3",
      "series_id": "NANYA_CONV_DRAM_BIT_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-09-30",
      "published_at": "2025-10-13",
      "frequency": "quarterly",
      "observation_type": "qualitative",
      "raw_label": "Bit shipment increased by mid-twenties percent QoQ",
      "lower": null,
      "upper": null,
      "unit": "source qualitative label",
      "source_id": "NANYA_2025Q3",
      "source_url": "https://www.nanya.com/en/IR/16?IRId=10046",
      "source_locator": "release body; Q3 2025 bit shipment",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "NO_DERIVATION_V1",
      "scope_note": "Issuer proxy only; no numeric midpoint inferred.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_REVENUE_2025Q4",
      "series_id": "NANYA_QUARTERLY_REVENUE",
      "family": "company_fundamentals",
      "product": "issuer_total",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-12-31",
      "published_at": "2026-01-19",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Quarterly sales revenue",
      "lower": 30094,
      "upper": 30094,
      "unit": "TWD million",
      "source_id": "NANYA_2025Q4",
      "source_url": "https://www.nanya.com/en/IR/16/Press%20Release?IRId=11068",
      "source_locator": "release body; quarterly sales revenue",
      "license_class": "issuer_ir_public_factual_extract",
      "derivation_formula": "none",
      "formula_version": "SOURCE_REPORTED_V1",
      "scope_note": "Issuer total; unaudited; not a pure conventional-DRAM price or order metric.",
      "is_derived": false,
      "input_metric_ids": []
    },
    {
      "metric_id": "NANYA_CONV_DRAM_ASP_QOQ_2025Q4",
      "series_id": "NANYA_CONV_DRAM_ASP_QOQ",
      "family": "conventional_dram",
      "product": "conventional_dram_proxy_ex_hbm",
      "issuer": "Nanya Technology Corporation",
      "period_end": "2025-12-31",
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    {
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    },
    {
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    {
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      "derivation_formula": "none",
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    },
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    },
    {
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    {
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    },
    {
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    {
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    {
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    {
      "metric_id": "MICRON_HBM_REVENUE_DIRECTION_FY2025Q1",
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    {
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    {
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      "metric_id": "KIOXIA_REVENUE_ACCELERATION_FY2025Q3",
      "series_id": "KIOXIA_QUARTERLY_REVENUE_ACCELERATION",
      "family": "company_fundamentals",
      "product": "issuer_total_revenue",
      "issuer": "Kioxia Holdings Corporation",
      "period_end": "2025-12-31",
      "published_at": "2026-07-16",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Calculated change in quarterly log revenue growth",
      "lower": -7.556443,
      "upper": -7.556443,
      "unit": "percentage points",
      "source_id": "KIOXIA_FY2025Q3",
      "source_url": "https://ssl4.eir-parts.net/doc/285A/ir_material_for_fiscal_ym4/198228/00.pdf",
      "source_locator": "derived from exact FY2025 Q1 through Q3 quarterly revenue",
      "license_class": "derived_from_issuer_ir_public_facts",
      "derivation_formula": "a_t = g_t - g_t-1",
      "formula_version": "ACCELERATION_PP_V1",
      "scope_note": "Issuer revenue acceleration; not a NAND ASP or order second derivative.",
      "is_derived": true,
      "input_metric_ids": ["KIOXIA_REVENUE_LOG_GROWTH_FY2025Q2", "KIOXIA_REVENUE_LOG_GROWTH_FY2025Q3"]
    },
    {
      "metric_id": "MICRON_REVENUE_LOG_GROWTH_FY2025Q3",
      "series_id": "MICRON_QUARTERLY_REVENUE_LOG_GROWTH",
      "family": "company_fundamentals",
      "product": "issuer_total_revenue",
      "issuer": "Micron Technology, Inc.",
      "period_end": "2025-05-29",
      "published_at": "2026-07-16",
      "frequency": "quarterly",
      "observation_type": "exact",
      "raw_label": "Calculated quarterly log revenue growth",
      "lower": 14.407723,
      "upper": 14.407723,
      "unit": "percent",
      "source_id": "MICRON_FY2025Q3_RESULTS",
      "source_url": "https://investors.micron.com/news-releases/news-release-details/micron-technology-inc-reports-results-third-quarter-fiscal-2025",
      "source_locator": "derived from exact fiscal Q2 and Q3 GAAP revenue",
      "license_class": "derived_from_issuer_ir_public_facts",
      "derivation_formula": "g_t = 100 * (ln(X_t) - ln(X_t-1))",
      "formula_version": "LOG_GROWTH_V1",
      "scope_note": "Issuer revenue operating pulse; not a DRAM, NAND, or HBM price/order growth measure.",
      "is_derived": true,
      "input_metric_ids": ["MICRON_REVENUE_FY2025Q2", "MICRON_REVENUE_FY2025Q3"]
    }
  ],
  "quality_controls": {
    "authoritative_observation_sources_only": true,
    "numeric_third_party_market_data_included": false,
    "midpoint_inference": false,
    "interpolation": false,
    "cross_issuer_aggregation": false,
    "qualitative_labels_used_in_numeric_derivatives": false,
    "derived_values_rounding_decimals": 6,
    "required_attribution": "Display issuer, period, publication date, and direct source link beside every observation.",
    "warning": {
      "zh": "不得把公司收入加速度称为 DRAM/NAND/HBM 价格二阶导，也不得把讨论、送样或售罄描述转换为订单金额。",
      "en": "Do not label issuer-revenue acceleration as a DRAM/NAND/HBM price second derivative, and do not convert discussions, samples, or sold-out statements into order values."
    }
  }
}