{
  "slug": "maize-price-heatmap",
  "kind": "heatmap",
  "title": "Maize: a decade of monthly price moves",
  "subtitle": "Monthly price changes (%) · 2017–2026",
  "takeaway": "Read each year across the months to find price increases, declines and quiet periods. Retained source prices extend through 2026-08; unavailable months stay grey.",
  "period": "2017-01–2026-08",
  "unit": "Monthly change (%) in the graphic; original price units in the data",
  "publisher": "World Bank · Pink Sheet",
  "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
  "licenseUrl": "https://datacatalog.worldbank.org/public-licenses#cc-by",
  "attribution": "World Bank Commodity Price Data (The Pink Sheet). World Bank, Commodity Price Data (The Pink Sheet), 2026-09-02, https://www.worldbank.org/en/research/commodity-markets. CC BY 4.0. Native selection from the retained Commodity Origins normalization, formatted by World Signals Monitor. Redistribution authorized by the project owner; original publisher metadata is preserved. No publisher endorsement is implied.",
  "retrievedAt": "2026-09-17T17:54:20.263737+00:00",
  "vintage": "94119cf550adb6a87a5e7640aad00e7c214362009c63512a7448222620b8cf40",
  "method": "For each of 120 calendar-month positions, calculate (current price / immediately preceding calendar-month price − 1) × 100. Both prices must be present and the previous price must be positive. The preceding December is retained as a dependency, outside the displayed grid. Source values remain in $/mt; calculated cell values are separate download fields. Colours use common thresholds at −15, −5, 0, +5 and +15 percent; extremes saturate without changing values. Missing, unpublished or invalid changes are grey; reported zero change is neutral.",
  "notes": [
    "Monthly Maize benchmark in the original $/mt unit. Each observation preserves its reporting month; no annual averaging or currency conversion.",
    "All 71 retained monthly benchmark series, including a natural-gas index. Labels identifying regions or ports describe price specifications rather than country observations. Original units and currencies are retained; nominal prices are not inflation-adjusted or averaged into annual values. The source vintage ends in August 2026. A missing month is a chart gap.",
    "Values, source flags and notes retain the reviewed snapshot. No new observations are acquired or interpolated."
  ],
  "explorer": "/explore/world-data/monthly-commodity-prices/",
  "rows": [
    {
      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2016-12",
      "value": "152.4",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
      "sourceLocator": "/global-data/pinksheet-maize.json · BENCHMARK/2016-12 · original row 20817 · value",
      "metricId": "pinksheet-maize",
      "measure": "Maize",
      "role": "value",
      "unit": "$/mt",
      "displayed": false,
      "originalRow": 20817,
      "originalField": "value",
      "retainedUrl": "/global-data/pinksheet-maize.json",
      "plottedValue": null
    },
    {
      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2017-01",
      "value": "160.0",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
      "sourceLocator": "/global-data/pinksheet-maize.json · BENCHMARK/2017-01 · original row 20818 · value",
      "metricId": "pinksheet-maize",
      "measure": "Maize",
      "role": "value",
      "unit": "$/mt",
      "displayed": true,
      "originalRow": 20818,
      "originalField": "value",
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      "plottedValue": 4.986876640419946
    },
    {
      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2017-02",
      "value": "162.9",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
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      "metricId": "pinksheet-maize",
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      "unit": "$/mt",
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      "originalField": "value",
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      "plottedValue": 1.8124999999999947
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    {
      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2017-03",
      "value": "159.0",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
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      "metricId": "pinksheet-maize",
      "measure": "Maize",
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      "unit": "$/mt",
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      "plottedValue": -2.3941068139963217
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      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2017-04",
      "value": "156.4",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
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      "code": "BENCHMARK",
      "period": "2017-05",
      "value": "158.6",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
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      "place": "Published price benchmark",
      "code": "BENCHMARK",
      "period": "2017-06",
      "value": "157.9",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
      "sourceLocator": "/global-data/pinksheet-maize.json · BENCHMARK/2017-06 · original row 20823 · value",
      "metricId": "pinksheet-maize",
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      "period": "2017-07",
      "value": "157.5",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
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      "place": "Published price benchmark",
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      "period": "2017-08",
      "value": "148.5",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
      "sourceUrl": "https://www.worldbank.org/en/research/commodity-markets",
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    {
      "place": "Published price benchmark",
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      "period": "2017-09",
      "value": "147.3",
      "status": "No flag supplied",
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      "metricId": "pinksheet-maize",
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    {
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      "value": "148.6",
      "status": "No flag supplied",
      "sourceNote": "{\"series_code\":\"MAIZE\",\"label\":\"Maize\",\"unit\":\"$/mt\",\"source_id\":\"pinksheet\",\"vintage\":\"2026-09-02\"}",
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      "status": "No flag supplied",
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      "status": "No flag supplied",
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      "value": "160.3",
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      "value": "160.7",
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      "period": "2019-01",
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        "definition": "Monthly Maize benchmark in the original $/mt unit. Each observation preserves its reporting month; no annual averaging or currency conversion.",
        "source": {
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        "json": "/global-data/pinksheet-maize.json",
        "csv": "/global-data/pinksheet-maize.csv",
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        "publisher": "World Bank · Pink Sheet",
        "licenseUrl": "https://datacatalog.worldbank.org/public-licenses#cc-by",
        "familyId": "monthly-commodity-prices"
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      "2020-12",
      "2021-01",
      "2021-02",
      "2021-03",
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      "2026-01",
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    "displayCodes": [
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    "caption": "Cell colour shows month-over-month change; source prices retain their original units. Grey means unavailable.",
    "credit": "World Bank · Monthly commodity benchmarks"
  },
  "topic": "Commodity prices"
}