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Mutual Fund API

The Mutual Fund API provides information about Mutual Funds including price, assets under management, expense ratio, holdings, identifiers (ISIN, CUSIP), and trailing total-return performance.

It covers US mutual funds and funds domiciled in Brazil, Chile, Israel, New Zealand, Peru, Spain and Sweden.

Available endpoints:

  • /v1/mutualfund - Get detailed information for a specific mutual fund by ticker or ISIN

For data on Exchange-Traded Funds (ETFs), use the ETF API instead.

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https://api.api-ninjas.com/v1/mutualfund

Returns comprehensive information about any Mutual Fund by its ticker or ISIN.

Parameters

Provide ticker or isin, but not both.

  • ticker  optional

    Mutual Fund ticker symbol (e.g., VFIAX, FXAIX, FZROX). Funds outside the US that have no ticker are looked up by country code and local fund code, written COUNTRY:CODE (e.g., BR:07593976000164, CL:8026-8-A). See supported countries.

  • isin  optional

    International Securities Identification Number of the Mutual Fund share class (e.g., US9229087104 for VFIAX, or ES0138841038 for a Spanish fund).

Supported countries

CountryLook up byExample
United StatesTicker or ISINVFIAX, US9229087104
BrazilISIN, or BR: plus the class CNPJ (14 digits; a subclass adds - and its subclass ID)BRTOPACTF007, BR:07593976000164
ChileCL: plus the fund RUN, check digit and seriesCL:8026-8-A
IsraelISIN, or IL: plus the TASE fund numberIL:5129523
New ZealandNZ: plus the fund numberNZ:FND1143
PeruPE: plus the manager and fund codes, and the series letter for funds with seriesPE:6104-0018, PE:6104-0005-A
SpainISINES0138841038
SwedenISINSE0001015348

Headers

  • X-Api-Key  required

    API Key associated with your account.

Response

The /v1/mutualfund endpoint returns a JSON object with the following fields, or an error if the request is unsuccessful.

  • fund_ticker

    Mutual Fund ticker symbol. For a fund outside the US, its COUNTRY:CODE identifier (e.g. CL:8026-8-A), which can be passed back as ticker.

  • fund_name

    Mutual Fund name.

  • isin

    International Securities Identification Number (ISIN) of the Mutual Fund.

  • cusip

    Nine-character Committee on Uniform Security Identification Procedures (CUSIP) identifier for the Mutual Fund.

  • country

    Two-letter code of the country where the Mutual Fund is domiciled.

  • currency

    Currency of price (ISO 4217, e.g. USD, BRL, EUR).

  • expense_ratio Premium only

    Annual net expense ratio of the Mutual Fund, expressed as a percent (e.g. 0.04 means 0.04%). For funds outside the US, the total annual cost figure published in the fund's home market.

  • price Premium only

    Latest net asset value (NAV) per share of the Mutual Fund, in currency. US mutual funds price once a day after the US market closes, usually publishing by 6pm ET, so this is the most recent daily NAV. Funds elsewhere price on their home market's schedule. null when no recent price is available.

  • aum Premium only

    Assets under management of the Mutual Fund in aum_currency. For most funds this is the fund's total net assets across all of its share classes, as of its latest report; for money market funds and for share classes that report their own net assets, it is the share class's.

  • aum_currency Premium only

    Currency of aum (ISO 4217).

  • aum_usd Premium only

    aum converted to USD.

  • holdings Premium only

    Array of the Mutual Fund's holdings, largest weight first: the most recent complete portfolio published for the fund. That is daily for funds that share a portfolio with an ETF share class, monthly for many fund families, money market funds and funds in several countries, and otherwise quarterly or semiannually, so check last_updated for the portfolio date.

    FieldDescription
    tickerTicker of the held security, or null for positions without one, such as most bonds and money market instruments.
    nameName of the held security.
    isinISIN of the held security, or null when none is reported (e.g. repurchase agreements).
    num_sharesNumber of shares held; the principal amount for bonds. null when not reported.
    weightPortfolio weight as a decimal fraction; 0.0751 means 7.51%.
    valuePosition value in USD, converted from the fund's currency for funds outside the US. null when not reported.
    last_updatedUnix timestamp of the portfolio date.
  • num_holdings Premium only

    Total number of holdings in the Mutual Fund.

  • performance Business tier and above

    Trailing returns for this share class, built from monthly total returns: net of fees, with distributions reinvested. Values are percents: 17.75 means +17.75%. Available on the Business tier and above.

    FieldDescription
    as_ofLast month-end the figures cover, usually 3–6 months before today.
    months_availableNumber of monthly returns on file.
    return_1m
    return_3m
    return_6m
    return_ytd
    Total return over the last 1, 3 and 6 months, and year to date.
    return_1y
    return_3y
    return_5y
    Cumulative total return over the last 1, 3 and 5 years.
    annualized_3y
    annualized_5y
    The 3- and 5-year returns, annualized.
    sinceFirst month of history.
    return_since
    annualized_since
    Cumulative and annualized return since since. annualized_since is null under 12 months.
    best_month
    worst_month
    Best and worst single month, as month and total_return.
    volatility_3yAnnualized standard deviation of monthly returns over the last 3 years.
    monthly_returnsEvery month on file, oldest first, as month and total_return.
    • Figures come from quarterly fund reports, not live prices, which is why as_of lags.
    • A period with any month missing is null, not estimated. There is no 10-year return.
    • Each share class has its own returns, so VFIAX and VFINX differ.
    • performance is null for a share class with no return history, such as a non-US or newly launched fund.

Live Demo

Live demo · no API key required
Query parameters
ticker
isin

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Headers
X-Api-KeyLog in or sign up to get your API key
GET
https://api.api-ninjas.com/v1/mutualfund?ticker=VFIAX
Sample response
{
"fund_ticker": "VFIAX",
"fund_name": "Vanguard 500 Index Fund Admiral Shares",
"isin": "US9229087104",
"cusip": "922908710",
"country": "US",
"currency": "USD",
"expense_ratio": 0.04,
"aum": 1700000000000,
"aum_currency": "USD",
"aum_usd": 1700000000000,
"price": 713.16,
"holdings": [
{
"ticker": "NVDA",
"name": "NVIDIA Corp",
"isin": "US67066G1040",
"num_shares": 629128862,
"weight": 0.0751446651,
"value": 125882393997.58,
"last_updated": 1785989310
},
{
"ticker": "AAPL",
"name": "Apple Inc",
"isin": "US0378331005",
"num_shares": 381525883,
"weight": 0.0659015549,
"value": 110398329504.88,
"last_updated": 1785989310
},
{
"ticker": "MSFT",
"name": "Microsoft Corp",
"isin": "US5949181045",
"num_shares": 192963340,
"weight": 0.0429674999,
"value": 71979185086.8,
"last_updated": 1785989310
}
],
"num_holdings": 509,
"performance": {
"as_of": "2026-03-31",
"months_available": 81,
"return_1m": -4.9841,
"return_3m": -4.345,
"return_6m": -1.8174,
"return_ytd": -4.345,
"return_1y": 17.7519,
"return_3y": 65.4227,
"return_5y": 76.3617,
"annualized_3y": 18.2674,
"annualized_5y": 12.0162,
"since": "2019-07-01",
"return_since": 145.8221,
"annualized_since": 14.2536,
"best_month": {
"month": "2020-04",
"total_return": 12.8186
},
"worst_month": {
"month": "2020-03",
"total_return": -12.3592
},
"volatility_3y": 12.0552,
"monthly_returns": [
{
"month": "2026-01",
"total_return": 1.4466
},
{
"month": "2026-02",
"total_return": -0.7629
},
{
"month": "2026-03",
"total_return": -4.9841
}
]
}
}

Code Examples

curl -X GET "https://api.api-ninjas.com/v1/mutualfund?ticker=VFIAX" \ -H "X-Api-Key: YOUR_API_KEY"

If your programming language is not listed in the Code Example above, you can still make API calls by using a HTTP request library written in your programming language and following the above documentation.

Frequently Asked Questions

  • Yes, but you must have a premium subscription. Commercial use of the Mutual Fund API is not permitted on the free tier. See our pricing page to choose a plan that fits your needs.
  • Sign up for a free account to instantly get your API key, then pass it in the X-Api-Key header on every request. The documentation above includes ready-to-run examples in cURL, Python, JavaScript, Node.js, and more.
  • Your API requests will simply be denied once you hit your monthly quota — you will never be charged more than the plan you signed up for. To increase your quota, you can upgrade your plan any time on our pricing page.
  • The API responds with a standard HTTP status code and a JSON error message describing the problem. See our error codes reference for the full list of codes and how to resolve each one, or contact support if you need help.
  • Passing a ticker (e.g. VFIAX) returns a JSON object with fund_name, the isin and cusip identifiers, the issuer country, plus price and aum (assets under management in USD). The price and aum fields are premium-only.
  • The price field is updated once per day in USD, usually after the US market closes and by 6pm ET. For intraday equity quotes, see the Stock Price API instead.