YahooFinanceApiNext

YahooFinanceApi - Next

This library is the successor to the Yahoo! Finance API wrapper: a small tool for retrieving data from Yahoo Finance, written in .NET Standard 2.0.

Features

• Get quotes
• Get historical data
• Get dividend data
• Get stock split data
• Get the portfolio of a security.

Changelog

LEGAL DISCLAIMER

YahooFinanceApi - Next is an independent open-source tool, not associated with, endorsed, or verified by Yahoo, Inc. It utilizes Yahoo's publicly available APIs and is meant strictly for personal use.

Supported Platforms

• .NET Core 2.0
• .NET framework 4.6.1 or above
• Xamarin.iOS
• Xamarin.Android
• Universal Windows Platform

How To Install

You can find the package through Nuget

PM> Install-Package YahooFinanceApiNext

Install Note

For traditional .NET framework user, if you find a "System.Runtime.Serialization.Primitives" missing exception is thrown when using this library, you have to install the missing package manually as nuget does not auto install this reference for you (Bugged?)

How to Avoid ban from Yahoo

The new API used for historical data is more restrictive than the previous one. The following simple rules allow me to request data without any issues:

• Request only one ticker at a time.
• Wait 1 second between requests.

How To Use

Add reference

using YahooFinanceApi;

Get stock quotes

// You could query multiple symbols with multiple fields through the following steps:
var securities = await Yahoo.Symbols("AAPL", "GOOG").Fields(Field.Symbol, Field.RegularMarketPrice, Field.FiftyTwoWeekHigh).QueryAsync();
var aapl = securities["AAPL"];
var price = aapl[Field.RegularMarketPrice] // or, you could use aapl.RegularMarketPrice directly for typed-value

Supported fields for stock quote

Language, QuoteType, QuoteSourceName, Currency, MarketState, RegularMarketPrice, RegularMarketTime, RegularMarketChange, RegularMarketOpen, RegularMarketDayHigh, RegularMarketDayLow, RegularMarketVolume, ShortName, FiftyTwoWeekHighChange, FiftyTwoWeekHighChangePercent, FiftyTwoWeekLow, FiftyTwoWeekHigh, DividendDate, EarningsTimestamp, EarningsTimestampStart, EarningsTimestampEnd, TrailingAnnualDividendRate, TrailingPE, TrailingAnnualDividendYield, EpsTrailingTwelveMonths, EpsForward, SharesOutstanding, BookValue, RegularMarketChangePercent, RegularMarketPreviousClose, Bid, Ask, BidSize, AskSize, MessageBoardId, FullExchangeName, LongName, FinancialCurrency, AverageDailyVolume3Month, AverageDailyVolume10Day, FiftyTwoWeekLowChange, FiftyTwoWeekLowChangePercent, TwoHundredDayAverageChangePercent, MarketCap, ForwardPE, PriceToBook, SourceInterval, ExchangeTimezoneName, ExchangeTimezoneShortName, Market, Exchange, ExchangeDataDelayedBy, PriceHint, FiftyDayAverage, FiftyDayAverageChange, FiftyDayAverageChangePercent, TwoHundredDayAverage, TwoHundredDayAverageChange, Tradeable, GmtOffSetMilliseconds, Symbol

Ignore invalid rows

// Sometimes, yahoo returns broken rows for historical calls, you could decide if these invalid rows is ignored or not by the following statement
Yahoo.IgnoreEmptyRows = true;

Get historical data for a stock

// You should be able to query data from various markets including US, HK, TW
// The startTime & endTime here defaults to EST timezone
var history = await Yahoo.GetHistoricalAsync("AAPL", new DateTime(2016, 1, 1), new DateTime(2016, 7, 1), Period.Daily);

foreach (var candle in history)
{
    Console.WriteLine($"DateTime: {candle.DateTime}, Open: {candle.Open}, High: {candle.High}, Low: {candle.Low}, Close: {candle.Close}, Volume: {candle.Volume}, AdjustedClose: {candle.AdjustedClose}");
}

Get dividend history for a stock

// You should be able to query data from various markets including US, HK, TW
var dividends = await Yahoo.GetDividendsAsync("AAPL", new DateTime(2016, 1, 1), new DateTime(2016, 7, 1));
foreach (var candle in dividends)
{
    Console.WriteLine($"DateTime: {candle.DateTime}, Dividend: {candle.Dividend}");
}

Get stock split history for a stock

var splits = await Yahoo.GetSplitsAsync("AAPL", new DateTime(2014, 6, 8), new DateTime(2014, 6, 10));
foreach (var s in splits)
{
    Console.WriteLine($"DateTime: {s.DateTime}, AfterSplit: {s.AfterSplit}, BeforeSplit: {s.BeforeSplit}");
}

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Changelog

v2.3.10

• Bug fixes:
  • #13 Incorrect processing of symbols with missing data