{
  "data_version": "seed-0.7 · marketcap-1 · 2026-08-30",
  "source": "https://finance.foundation",
  "license": {
    "finance_foundation_data": "CC BY 4.0 — attribution: Finance Foundation (https://finance.foundation)",
    "upstream_values": "Fields sourced from a provider carry their own source field and remain under that provider's terms — see https://finance.foundation/api/v1/sources"
  },
  "entity": "fund",
  "data": {
    "id": "fidelity-government-mmf",
    "lei": "549300VZUKS6UD4H4866",
    "name": "Fidelity Government Money Market Fund",
    "symbol": "SPAXX",
    "type": "Money market fund",
    "manager": "Fidelity Investments",
    "manager_company": null,
    "strategy": "Government money market — stable $1.00 share price",
    "country": "united-states",
    "aum_usd_bn": 456.9,
    "description": "The largest money market fund in the United States, and the default cash sweep for millions of brokerage accounts. Money funds hold short government paper and aim to keep a share worth exactly one dollar — a promise that is not a guarantee, and whose failure in 2008 required a Treasury backstop for the whole industry.",
    "listed": false,
    "structure": {
      "listed": false,
      "dealing": "at NAV from the manager",
      "why": "A money market fund is bought and sold at net asset value with the fund company, not on an exchange. Its ticker is quoted through the Nasdaq mutual-fund quotation service, which distributes daily NAVs rather than trading shares.",
      "ticker": "SPAXX",
      "sec": {
        "cik": 754510,
        "series_id": "S000007051",
        "series_name": "Fidelity Government Money Market Fund",
        "class_id": "C000019230",
        "entity_name": "FIDELITY HEREFORD STREET TRUST"
      },
      "classes": [
        {
          "ticker": "SPAXX",
          "class_id": "C000019230",
          "name": "Fidelity Government Money Market Fund"
        },
        {
          "ticker": "FZAXX",
          "class_id": "C000154303",
          "name": "Capital Reserves Class"
        },
        {
          "ticker": "FZBXX",
          "class_id": "C000154304",
          "name": "Daily Money Class"
        },
        {
          "ticker": "FZCXX",
          "class_id": "C000154305",
          "name": "Premium Class"
        },
        {
          "ticker": "FZGXX",
          "class_id": "C000190683",
          "name": "Advisor M Class"
        },
        {
          "ticker": "FNBXX",
          "class_id": "C000198393",
          "name": "Class K6"
        },
        {
          "ticker": "FZSXX",
          "class_id": "C000232685",
          "name": "Class S"
        }
      ],
      "tracks": null,
      "tracks_note": "Holds short-dated government paper and aims to keep a share worth exactly $1.00 — the stable price it reported to the SEC. That is a target, not a guarantee.",
      "route": "SEC series/class",
      "listing": null,
      "note": "A fund is not the same thing as a ticker. Where `classes` holds more than one entry they are share classes of ONE portfolio — same holdings, same manager, different terms — and in Vanguard's case the ETF is itself a class of the mutual fund. Series and class identifiers come from the SEC's Investment Company Series and Class report. `listed: false` means the entry is an institutional pool with no units to buy, which is why it has no ticker.",
      "market_link": null,
      "tracks_link": null
    },
    "aum_seed_usd_bn": 456.9,
    "size": {
      "usd": 456934720656,
      "basis": "net assets of the whole series, all seven share classes",
      "as_of": "2026-07-31",
      "form": "N-MFP",
      "filed": null,
      "source": "SEC N-MFP data set",
      "series_lei": "549300VZUKS6UD4H4866",
      "series_name": "Fidelity Government Money Market Fund",
      "url": "https://www.sec.gov/data-research/sec-markets-data/dera-form-n-mfp-data-sets",
      "note": "`basis` says what is counted, because how big a fund is has more than one honest answer: a filing reports the whole series while a quote screen shows one share class. `aum_seed_usd_bn` on the entity is the earlier undated figure, kept so the two can be compared."
    }
  },
  "field_provenance": {
    "aum_usd_bn": "Finance Foundation seed reference value compiled from the manager's published disclosures, approximate, Q2 2026 — AUM moves daily."
  },
  "links": {
    "html": "https://finance.foundation/funds/fidelity-government-mmf",
    "graph": "https://finance.foundation/api/v1/graph/funds/fidelity-government-mmf",
    "sources": "https://finance.foundation/api/v1/sources"
  }
}