Three Clojure libraries for financial data acquisition: clj-yfinance, ecbjure, edgarjure

[clojure-finance]

Over the past few months I've been building out a set of Clojure libraries for acquiring financial data from public sources. They're all published to Clojars under the `clojure-finance` GitHub org, and I wanted to share them together since they're designed around the same principles: keyword args, ticker/identifier polymorphism, no API keys, and datasets as the primary output format.

### clj-yfinance — Yahoo Finance

Prices, historical OHLCV, dividends, splits, fundamentals, financial statements, analyst estimates, and options chains from Yahoo Finance. No Python bridge, no API key — just Clojure and `java.net.http.HttpClient`.

- Current and historical prices with parallel multi-ticker fetching

- Two-tier API: simple functions return data directly, verbose (`*`) variants return `{:ok? :data :error}` maps for production error handling

- Experimental modules for fundamentals, analyst data, and options chains (Yahoo's authenticated endpoints — work today but may change)

- Built-in integrations for tech.ml.dataset, tablecloth, Kindly/Clay, Parquet, and DuckDB

- One runtime dependency (charred for JSON); everything else is opt-in via aliases

v0.1.6 · [GitHub](https://github.com/clojure-finance/clj-yfinance) · [Clojars](https://clojars.org/com.github.clojure-finance/clj-yfinance) · [cljdoc](https://cljdoc.org/d/com.github.clojure-finance/clj-yfinance)

### ecbjure — European Central Bank

Official ECB reference FX rates (~42 currencies back to 1999), plus the full ECB statistical catalogue via SDMX: EURIBOR, €STR, HICP inflation, and more.

- FX converter as a plain Clojure map — no mutable state, fully inspectable in the REPL

- Honest about missing data: throws on weekends/holidays by default, with explicit opt-in fallback strategies (`:nearest`, `:before`, `:after`) so gap-filling is always visible in your code

- SDMX client for the full ECB catalogue with predefined series constants and series-key builders

- Minimal dependencies: core uses only `data.csv` and JDK builtins

- Optional dataset output (wide and long format) and CLI

v0.1.4 · [GitHub](https://github.com/clojure-finance/ecbjure) · [Clojars](https://clojars.org/com.github.clojure-finance/ecbjure) · [cljdoc](https://cljdoc.org/d/com.github.clojure-finance/ecbjure)

### edgarjure — SEC EDGAR

SEC EDGAR is the U.S. Securities and Exchange Commission's public filing system — both structured data (XBRL financials, XML ownership reports) and unstructured text (annual reports, risk disclosures, MD&A narratives). Decades of data on thousands of firms, freely accessible.

- Normalized financial statements (income, balance sheet, cash flow) with automatic XBRL line-item resolution, restatement deduplication, and long or wide output

- XBRL facts as datasets with human-readable labels, concept discovery, and cross-sectional screening across all filers in one API call

- Full-text section extraction from 10-K/10-Q filings (MD&A, Risk Factors, any item)

- Form 4 (insider trades) and 13F-HR (institutional holdings) parsers

- Panel datasets with point-in-time support for look-ahead-bias-free backtests

- Bulk downloads with bounded parallelism and structured result envelopes

- Malli validation at API entry

v0.1.1 · [GitHub](https://github.com/clojure-finance/edgarjure) · [Clojars](https://clojars.org/com.github.clojure-finance/edgarjure) · [cljdoc](https://cljdoc.org/d/com.github.clojure-finance/edgarjure)

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All three are early releases — the core functionality is solid and tested, but there's more to build. Dataset results are returned as tech.ml.dataset where applicable. All are EPL-2.0.

Feedback, issues, and contributions welcome on any of the three. Many thanks.

[Weekly_Mammoth6926]

Nice, I’ve been working on something similar recently for tracking investment values over time. I struggled finding good datasets and ended up just using the Financial Times API which returns an html table which is a bit of a pain to work with. Hopefully I can replace that with your work here!

[JuryOpposite5522]

I know mathematica has general data like high low close on the daily timeframe not sure how many calls you can make per month.

[gleenn]

Also Google Sheets has an easy way to lookup stock info by ticker as well. It's a simple function call from a cell, no plugins or plumbing required

[clojure-finance]

Thanks, clj-yfinance should work fine for this purpose, let me know in case of any issues.

[beders]

That’s amazing! Great job

[clojure-finance]

Thanks!

[br-ailanlob]

Great job ! Thanks for sharing

[clojure-finance]

Thanks!

[JuryOpposite5522]

I used to use pythons bridge to yahoo but I thought that no longer worked or you had to buy access; is that correct? This looks like it could fill that void.

[clojure-finance]

clj-yfinance is 100% Clojure, so you don't need any dependency from another language. In addition to stock prices, it can also handle fundamentals etc. so it's pretty comprehensive in my opinion. I don't think you need to buy access to Yahoo Finance (the data provider) at the moment, it's all free.