{
  "signal": "certvas-procurement-demand-signal-v1",
  "name": "Certvas Procurement-Demand Signal",
  "version": "v1",
  "sku": "AF-TENDER",
  "label": "Published for research and informational use. Not administered as, and not for use as, a regulated benchmark.",
  "grain": "country_category_month",
  "point_in_time": "cell knowable at month_end; serving layer filters month_end <= as_of",
  "covered_countries": [
    "ZA"
  ],
  "source": "certvas-api",
  "snapshot_hash": "9abddcf0d44b7f6b",
  "caveats": [
    "Lead on shares, not raw counts: the underlying OCDS feed is backfilled in windows, so n_tenders is ingestion-coverage sensitive; category_share_pct and buyer_hhi are within-month ratios and are volume-robust.",
    "No value-weighting: OCDS value_amount coverage is sparse and mixes currencies; value_disclosed_pct is context only and values are never summed across currencies.",
    "v1 universe is South Africa (S007); coverage expands as more national OCDS feeds clear the licence register.",
    "Suppliers are not yet resolved to listed issuers \u2014 the signal maps to procurement categories/sectors, not directly to individual listed tickers (roadmap)."
  ],
  "observations": [
    {
      "country": "ZA",
      "category": "goods",
      "month": "2024-06",
      "month_end": "2024-06-30",
      "n_tenders": 201,
      "n_buyers": 76,
      "buyer_hhi": 365.6,
      "category_share_pct": 17.06,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2024-06",
      "month_end": "2024-06-30",
      "n_tenders": 550,
      "n_buyers": 183,
      "buyer_hhi": 206.6,
      "category_share_pct": 46.69,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2024-06",
      "month_end": "2024-06-30",
      "n_tenders": 266,
      "n_buyers": 142,
      "buyer_hhi": 123.5,
      "category_share_pct": 22.58,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2024-06",
      "month_end": "2024-06-30",
      "n_tenders": 161,
      "n_buyers": 66,
      "buyer_hhi": 334.5,
      "category_share_pct": 13.67,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2024-09",
      "month_end": "2024-09-30",
      "n_tenders": 152,
      "n_buyers": 75,
      "buyer_hhi": 249.3,
      "category_share_pct": 18.05,
      "share_mom_3m_pp": 0.99,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2024-09",
      "month_end": "2024-09-30",
      "n_tenders": 399,
      "n_buyers": 153,
      "buyer_hhi": 201.6,
      "category_share_pct": 47.39,
      "share_mom_3m_pp": 0.7,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2024-09",
      "month_end": "2024-09-30",
      "n_tenders": 160,
      "n_buyers": 103,
      "buyer_hhi": 153.9,
      "category_share_pct": 19,
      "share_mom_3m_pp": -3.58,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2024-09",
      "month_end": "2024-09-30",
      "n_tenders": 131,
      "n_buyers": 62,
      "buyer_hhi": 295.4,
      "category_share_pct": 15.56,
      "share_mom_3m_pp": 1.89,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2024-10",
      "month_end": "2024-10-31",
      "n_tenders": 208,
      "n_buyers": 78,
      "buyer_hhi": 515.9,
      "category_share_pct": 17.51,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2024-10",
      "month_end": "2024-10-31",
      "n_tenders": 587,
      "n_buyers": 183,
      "buyer_hhi": 195.9,
      "category_share_pct": 49.41,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2024-10",
      "month_end": "2024-10-31",
      "n_tenders": 219,
      "n_buyers": 130,
      "buyer_hhi": 125.3,
      "category_share_pct": 18.43,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2024-10",
      "month_end": "2024-10-31",
      "n_tenders": 174,
      "n_buyers": 72,
      "buyer_hhi": 304.5,
      "category_share_pct": 14.65,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2024-11",
      "month_end": "2024-11-30",
      "n_tenders": 171,
      "n_buyers": 65,
      "buyer_hhi": 409.4,
      "category_share_pct": 19.06,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2024-11",
      "month_end": "2024-11-30",
      "n_tenders": 406,
      "n_buyers": 139,
      "buyer_hhi": 301.6,
      "category_share_pct": 45.26,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2024-11",
      "month_end": "2024-11-30",
      "n_tenders": 214,
      "n_buyers": 104,
      "buyer_hhi": 164.2,
      "category_share_pct": 23.86,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2024-11",
      "month_end": "2024-11-30",
      "n_tenders": 106,
      "n_buyers": 46,
      "buyer_hhi": 537.6,
      "category_share_pct": 11.82,
      "share_mom_3m_pp": null,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2024-12",
      "month_end": "2024-12-31",
      "n_tenders": 71,
      "n_buyers": 37,
      "buyer_hhi": 779.6,
      "category_share_pct": 13.84,
      "share_mom_3m_pp": -4.21,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2024-12",
      "month_end": "2024-12-31",
      "n_tenders": 239,
      "n_buyers": 101,
      "buyer_hhi": 339.5,
      "category_share_pct": 46.59,
      "share_mom_3m_pp": -0.8,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2024-12",
      "month_end": "2024-12-31",
      "n_tenders": 128,
      "n_buyers": 70,
      "buyer_hhi": 236.8,
      "category_share_pct": 24.95,
      "share_mom_3m_pp": 5.95,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2024-12",
      "month_end": "2024-12-31",
      "n_tenders": 75,
      "n_buyers": 43,
      "buyer_hhi": 464,
      "category_share_pct": 14.62,
      "share_mom_3m_pp": -0.94,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-01",
      "month_end": "2025-01-31",
      "n_tenders": 169,
      "n_buyers": 69,
      "buyer_hhi": 419.1,
      "category_share_pct": 19.38,
      "share_mom_3m_pp": 1.87,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-01",
      "month_end": "2025-01-31",
      "n_tenders": 361,
      "n_buyers": 122,
      "buyer_hhi": 300.3,
      "category_share_pct": 41.4,
      "share_mom_3m_pp": -8.01,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-01",
      "month_end": "2025-01-31",
      "n_tenders": 199,
      "n_buyers": 116,
      "buyer_hhi": 151.8,
      "category_share_pct": 22.82,
      "share_mom_3m_pp": 4.39,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-01",
      "month_end": "2025-01-31",
      "n_tenders": 143,
      "n_buyers": 61,
      "buyer_hhi": 391.7,
      "category_share_pct": 16.4,
      "share_mom_3m_pp": 1.75,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-02",
      "month_end": "2025-02-28",
      "n_tenders": 274,
      "n_buyers": 97,
      "buyer_hhi": 312.7,
      "category_share_pct": 19.7,
      "share_mom_3m_pp": 0.64,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-02",
      "month_end": "2025-02-28",
      "n_tenders": 663,
      "n_buyers": 206,
      "buyer_hhi": 205.3,
      "category_share_pct": 47.66,
      "share_mom_3m_pp": 2.4,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-02",
      "month_end": "2025-02-28",
      "n_tenders": 291,
      "n_buyers": 150,
      "buyer_hhi": 129.5,
      "category_share_pct": 20.92,
      "share_mom_3m_pp": -2.94,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-02",
      "month_end": "2025-02-28",
      "n_tenders": 163,
      "n_buyers": 74,
      "buyer_hhi": 281.9,
      "category_share_pct": 11.72,
      "share_mom_3m_pp": -0.1,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-03",
      "month_end": "2025-03-31",
      "n_tenders": 217,
      "n_buyers": 92,
      "buyer_hhi": 217.7,
      "category_share_pct": 17.4,
      "share_mom_3m_pp": 3.56,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-03",
      "month_end": "2025-03-31",
      "n_tenders": 603,
      "n_buyers": 174,
      "buyer_hhi": 317.5,
      "category_share_pct": 48.36,
      "share_mom_3m_pp": 1.77,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-03",
      "month_end": "2025-03-31",
      "n_tenders": 268,
      "n_buyers": 142,
      "buyer_hhi": 122,
      "category_share_pct": 21.49,
      "share_mom_3m_pp": -3.46,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-03",
      "month_end": "2025-03-31",
      "n_tenders": 159,
      "n_buyers": 75,
      "buyer_hhi": 280.4,
      "category_share_pct": 12.75,
      "share_mom_3m_pp": -1.87,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-04",
      "month_end": "2025-04-30",
      "n_tenders": 174,
      "n_buyers": 74,
      "buyer_hhi": 404.9,
      "category_share_pct": 17.77,
      "share_mom_3m_pp": -1.61,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-04",
      "month_end": "2025-04-30",
      "n_tenders": 486,
      "n_buyers": 156,
      "buyer_hhi": 217.1,
      "category_share_pct": 49.64,
      "share_mom_3m_pp": 8.24,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-04",
      "month_end": "2025-04-30",
      "n_tenders": 191,
      "n_buyers": 99,
      "buyer_hhi": 147.7,
      "category_share_pct": 19.51,
      "share_mom_3m_pp": -3.31,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-04",
      "month_end": "2025-04-30",
      "n_tenders": 128,
      "n_buyers": 65,
      "buyer_hhi": 307.6,
      "category_share_pct": 13.07,
      "share_mom_3m_pp": -3.33,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-05",
      "month_end": "2025-05-31",
      "n_tenders": 304,
      "n_buyers": 72,
      "buyer_hhi": 569.4,
      "category_share_pct": 21.56,
      "share_mom_3m_pp": 1.86,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-05",
      "month_end": "2025-05-31",
      "n_tenders": 660,
      "n_buyers": 179,
      "buyer_hhi": 207.9,
      "category_share_pct": 46.81,
      "share_mom_3m_pp": -0.85,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-05",
      "month_end": "2025-05-31",
      "n_tenders": 290,
      "n_buyers": 135,
      "buyer_hhi": 123.4,
      "category_share_pct": 20.57,
      "share_mom_3m_pp": -0.35,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-05",
      "month_end": "2025-05-31",
      "n_tenders": 156,
      "n_buyers": 60,
      "buyer_hhi": 589.3,
      "category_share_pct": 11.06,
      "share_mom_3m_pp": -0.66,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-06",
      "month_end": "2025-06-30",
      "n_tenders": 226,
      "n_buyers": 87,
      "buyer_hhi": 259.2,
      "category_share_pct": 17.71,
      "share_mom_3m_pp": 0.31,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-06",
      "month_end": "2025-06-30",
      "n_tenders": 629,
      "n_buyers": 198,
      "buyer_hhi": 170.4,
      "category_share_pct": 49.29,
      "share_mom_3m_pp": 0.93,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-06",
      "month_end": "2025-06-30",
      "n_tenders": 250,
      "n_buyers": 124,
      "buyer_hhi": 152.3,
      "category_share_pct": 19.59,
      "share_mom_3m_pp": -1.9,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-06",
      "month_end": "2025-06-30",
      "n_tenders": 171,
      "n_buyers": 80,
      "buyer_hhi": 300.6,
      "category_share_pct": 13.4,
      "share_mom_3m_pp": 0.65,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-07",
      "month_end": "2025-07-31",
      "n_tenders": 224,
      "n_buyers": 77,
      "buyer_hhi": 547.3,
      "category_share_pct": 18.32,
      "share_mom_3m_pp": 0.55,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-07",
      "month_end": "2025-07-31",
      "n_tenders": 569,
      "n_buyers": 199,
      "buyer_hhi": 198.3,
      "category_share_pct": 46.52,
      "share_mom_3m_pp": -3.12,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-07",
      "month_end": "2025-07-31",
      "n_tenders": 255,
      "n_buyers": 132,
      "buyer_hhi": 131.8,
      "category_share_pct": 20.85,
      "share_mom_3m_pp": 1.34,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-07",
      "month_end": "2025-07-31",
      "n_tenders": 175,
      "n_buyers": 67,
      "buyer_hhi": 450.3,
      "category_share_pct": 14.31,
      "share_mom_3m_pp": 1.24,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-08",
      "month_end": "2025-08-31",
      "n_tenders": 203,
      "n_buyers": 79,
      "buyer_hhi": 361.3,
      "category_share_pct": 17.15,
      "share_mom_3m_pp": -4.41,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-08",
      "month_end": "2025-08-31",
      "n_tenders": 511,
      "n_buyers": 165,
      "buyer_hhi": 198,
      "category_share_pct": 43.16,
      "share_mom_3m_pp": -3.65,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-08",
      "month_end": "2025-08-31",
      "n_tenders": 266,
      "n_buyers": 142,
      "buyer_hhi": 108.3,
      "category_share_pct": 22.47,
      "share_mom_3m_pp": 1.9,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-08",
      "month_end": "2025-08-31",
      "n_tenders": 204,
      "n_buyers": 67,
      "buyer_hhi": 877.5,
      "category_share_pct": 17.23,
      "share_mom_3m_pp": 6.17,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-09",
      "month_end": "2025-09-30",
      "n_tenders": 175,
      "n_buyers": 76,
      "buyer_hhi": 246.5,
      "category_share_pct": 17.97,
      "share_mom_3m_pp": 0.26,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-09",
      "month_end": "2025-09-30",
      "n_tenders": 400,
      "n_buyers": 142,
      "buyer_hhi": 237.9,
      "category_share_pct": 41.07,
      "share_mom_3m_pp": -8.22,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "uncategorized",
      "month": "2025-09",
      "month_end": "2025-09-30",
      "n_tenders": 224,
      "n_buyers": 126,
      "buyer_hhi": 115.2,
      "category_share_pct": 23,
      "share_mom_3m_pp": 3.41,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "works",
      "month": "2025-09",
      "month_end": "2025-09-30",
      "n_tenders": 175,
      "n_buyers": 68,
      "buyer_hhi": 556.7,
      "category_share_pct": 17.97,
      "share_mom_3m_pp": 4.57,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "goods",
      "month": "2025-10",
      "month_end": "2025-10-31",
      "n_tenders": 189,
      "n_buyers": 75,
      "buyer_hhi": 339.6,
      "category_share_pct": 17.86,
      "share_mom_3m_pp": -0.46,
      "value_disclosed_pct": 100
    },
    {
      "country": "ZA",
      "category": "services",
      "month": "2025-10",
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