BasicYahooFinance

This is a simple Ruby gem to query the Yahoo! Finance API.

Most of the available gems available on rubygems.org for this purpose are either not maintained anymore or simply do not working due to outdated API code. The goal of this gem is to be as basic as possible, hence the name, and to "simply" work. It would be typcially used to get information such as ask/bid price, close price, volume, for one or more stocks by using its symbol. The data is returned raw directly from the API as JSON output.

Add this line to your application's Gemfile:

gem 'basic_yahoo_finance'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install basic_yahoo_finance

Instantiate the Query class and use the quotes method on it with either a single stock as a String and a single module as a String or by passing an Array of stocks such as show in the two examples below.

# Query a stock, with the price module

query = BasicYahooFinance::Query.new
data = query.quotes('AVEM', 'price')

# OR the module argument can be left empty as the price module is the default
data = query.quotes('AVEM')

# Query multiple stocks

query = BasicYahooFinance::Query.new
data = query.quotes(['AVDV', 'AVUV'])

This will return a Hash of the stock information available under its symbol name as key in the Hash. For example:

# Get stock's actual price as a formatted string

data['AVEM']['regularMarketPrice']['fmt']
# "52.72"

# OR the raw value
data["AVEM"]["regularMarketPrice"]["raw"]
# 52.72

While price is a common module, its not the only one. A list of known modules include:

assetProfile
balanceSheetHistory
balanceSheetHistoryQuarterly
calendarEvents
cashflowStatementHistory
cashflowStatementHistoryQuarterly
defaultKeyStatistics
earnings
earningsHistory
earningsTrend
esgScores
financialData
fundOwnership
incomeStatementHistory
incomeStatementHistoryQuarterly
indexTrend
industryTrend
insiderHolders
insiderTransactions
institutionOwnership
majorDirectHolders
majorHoldersBreakdown
netSharePurchaseActivity
price
recommendationTrend
secFilings
sectorTrend
summaryDetail
summaryProfile
upgradeDowngradeHistory
pageviews
quotetype

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

MiniTest is used as test framework and can be run using:

$ rake test

As linter RuboCop is used and can be run using:

$ rake rubocop

This gem is being developed with Ruby 3.2 but should be downward compatible with at least all supported versions of Ruby.

Bug reports and pull requests are welcome on GitHub at https://github.com/towards/basic_yahoo_finance. If you submit a pull request please make sure to write a test case using MiniTest covering your changes.