Files
quantconnect--lean/Common/SymbolRepresentation.cs
T
2026-07-13 13:02:50 +08:00

664 lines
31 KiB
C#

/*
* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Linq;
using QuantConnect.Logging;
using System.Globalization;
using QuantConnect.Securities;
using System.Collections.Generic;
using QuantConnect.Securities.Option;
using QuantConnect.Securities.Future;
using QuantConnect.Securities.FutureOption;
using static QuantConnect.StringExtensions;
using System.Text.RegularExpressions;
using QuantConnect.Securities.IndexOption;
namespace QuantConnect
{
/// <summary>
/// Public static helper class that does parsing/generation of symbol representations (options, futures)
/// </summary>
public static class SymbolRepresentation
{
// Define the regex as a private readonly static field and compile it
private static readonly Regex _optionTickerRegex = new Regex(@"^([A-Z0-9\.]+)\s*(\d{6})([CP])(\d{8})$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
/// <summary>
/// Class contains future ticker properties returned by ParseFutureTicker()
/// </summary>
public class FutureTickerProperties
{
/// <summary>
/// Underlying name
/// </summary>
public string Underlying { get; set; }
/// <summary>
/// Short expiration year
/// </summary>
public int ExpirationYearShort { get; set; }
/// <summary>
/// Short expiration year digits
/// </summary>
public int ExpirationYearShortLength { get; set; }
/// <summary>
/// Expiration month
/// </summary>
public int ExpirationMonth { get; set; }
/// <summary>
/// Expiration day
/// </summary>
public int ExpirationDay { get; set; }
}
/// <summary>
/// Class contains option ticker properties returned by ParseOptionTickerIQFeed()
/// </summary>
public class OptionTickerProperties
{
/// <summary>
/// Underlying name
/// </summary>
public string Underlying { get; set; }
/// <summary>
/// Option right
/// </summary>
public OptionRight OptionRight { get; set; }
/// <summary>
/// Option strike
/// </summary>
public decimal OptionStrike { get; set; }
/// <summary>
/// Expiration date
/// </summary>
public DateTime ExpirationDate { get; set; }
}
/// <summary>
/// Function returns underlying name, expiration year, expiration month, expiration day for the future contract ticker. Function detects if
/// the format used is either 1 or 2 digits year, and if day code is present (will default to 1rst day of month). Returns null, if parsing failed.
/// Format [Ticker][2 digit day code OPTIONAL][1 char month code][2/1 digit year code]
/// </summary>
/// <param name="ticker"></param>
/// <returns>Results containing 1) underlying name, 2) short expiration year, 3) expiration month</returns>
public static FutureTickerProperties ParseFutureTicker(string ticker)
{
var doubleDigitYear = char.IsDigit(ticker.Substring(ticker.Length - 2, 1)[0]);
var doubleDigitOffset = doubleDigitYear ? 1 : 0;
var expirationDayOffset = 0;
var expirationDay = 1;
if (ticker.Length > 4 + doubleDigitOffset)
{
var potentialExpirationDay = ticker.Substring(ticker.Length - 4 - doubleDigitOffset, 2);
var containsExpirationDay = char.IsDigit(potentialExpirationDay[0]) && char.IsDigit(potentialExpirationDay[1]);
expirationDayOffset = containsExpirationDay ? 2 : 0;
if (containsExpirationDay && !int.TryParse(potentialExpirationDay, out expirationDay))
{
return null;
}
}
var expirationYearString = ticker.Substring(ticker.Length - 1 - doubleDigitOffset, 1 + doubleDigitOffset);
var expirationMonthString = ticker.Substring(ticker.Length - 2 - doubleDigitOffset, 1);
var underlyingString = ticker.Substring(0, ticker.Length - 2 - doubleDigitOffset - expirationDayOffset);
int expirationYearShort;
if (!int.TryParse(expirationYearString, out expirationYearShort))
{
return null;
}
if (!FuturesMonthCodeLookup.ContainsKey(expirationMonthString))
{
return null;
}
var expirationMonth = FuturesMonthCodeLookup[expirationMonthString];
return new FutureTickerProperties
{
Underlying = underlyingString,
ExpirationYearShort = expirationYearShort,
ExpirationYearShortLength = expirationYearString.Length,
ExpirationMonth = expirationMonth,
ExpirationDay = expirationDay
};
}
/// <summary>
/// Helper method to parse and generate a future symbol from a given user friendly representation
/// </summary>
/// <param name="ticker">The future ticker, for example 'ESZ1'</param>
/// <param name="futureYear">Clarifies the year for the current future</param>
/// <returns>The future symbol or null if failed</returns>
public static Symbol ParseFutureSymbol(string ticker, int? futureYear = null)
{
var parsed = ParseFutureTicker(ticker);
if (parsed == null)
{
return null;
}
var underlying = parsed.Underlying;
var expirationMonth = parsed.ExpirationMonth;
var expirationYear = GetExpirationYear(futureYear, parsed);
if (!SymbolPropertiesDatabase.FromDataFolder().TryGetMarket(underlying, SecurityType.Future, out var market))
{
Log.Debug($@"SymbolRepresentation.ParseFutureSymbol(): {Messages.SymbolRepresentation.FailedToGetMarketForTickerAndUnderlying(ticker, underlying)}");
return null;
}
var expiryFunc = FuturesExpiryFunctions.FuturesExpiryFunction(Symbol.Create(underlying, SecurityType.Future, market));
var expiryDate = expiryFunc(new DateTime(expirationYear, expirationMonth, 1));
return Symbol.CreateFuture(underlying, market, expiryDate);
}
/// <summary>
/// Creates a future option Symbol from the provided ticker
/// </summary>
/// <param name="ticker">The future option ticker, for example 'ESZ0 P3590'</param>
/// <param name="strikeScale">Optional the future option strike scale factor</param>
public static Symbol ParseFutureOptionSymbol(string ticker, int strikeScale = 1)
{
var split = ticker.Split(' ');
if (split.Length != 2)
{
return null;
}
var parsed = ParseFutureTicker(split[0]);
if (parsed == null)
{
return null;
}
ticker = parsed.Underlying;
OptionRight right;
if (split[1][0] == 'P' || split[1][0] == 'p')
{
right = OptionRight.Put;
}
else if (split[1][0] == 'C' || split[1][0] == 'c')
{
right = OptionRight.Call;
}
else
{
return null;
}
var strike = split[1].Substring(1);
if (parsed.ExpirationYearShort < 10)
{
parsed.ExpirationYearShort += 20;
}
var expirationYearParsed = 2000 + parsed.ExpirationYearShort;
var expirationDate = new DateTime(expirationYearParsed, parsed.ExpirationMonth, 1);
var strikePrice = decimal.Parse(strike, NumberStyles.Any, CultureInfo.InvariantCulture);
var futureTicker = FuturesOptionsSymbolMappings.MapFromOption(ticker);
if (!SymbolPropertiesDatabase.FromDataFolder().TryGetMarket(futureTicker, SecurityType.Future, out var market))
{
Log.Debug($"SymbolRepresentation.ParseFutureOptionSymbol(): {Messages.SymbolRepresentation.NoMarketFound(futureTicker)}");
return null;
}
var canonicalFuture = Symbol.Create(futureTicker, SecurityType.Future, market);
var futureExpiry = FuturesExpiryFunctions.FuturesExpiryFunction(canonicalFuture)(expirationDate);
var future = Symbol.CreateFuture(futureTicker, market, futureExpiry);
var futureOptionExpiry = FuturesOptionsExpiryFunctions.GetFutureOptionExpiryFromFutureExpiry(future);
return Symbol.CreateOption(future,
market,
OptionStyle.American,
right,
strikePrice / strikeScale,
futureOptionExpiry);
}
/// <summary>
/// Returns future symbol ticker from underlying and expiration date. Function can generate tickers of two formats: one and two digits year.
/// Format [Ticker][2 digit day code][1 char month code][2/1 digit year code], more information at http://help.tradestation.com/09_01/tradestationhelp/symbology/futures_symbology.htm
/// </summary>
/// <param name="underlying">String underlying</param>
/// <param name="expiration">Expiration date</param>
/// <param name="doubleDigitsYear">True if year should represented by two digits; False - one digit</param>
/// <param name="includeExpirationDate">True if expiration date should be included</param>
/// <returns>The user friendly future ticker</returns>
public static string GenerateFutureTicker(string underlying, DateTime expiration, bool doubleDigitsYear = true, bool includeExpirationDate = true)
{
var year = doubleDigitsYear ? expiration.Year % 100 : expiration.Year % 10;
var month = expiration.Month;
var contractMonthDelta = FuturesExpiryUtilityFunctions.GetDeltaBetweenContractMonthAndContractExpiry(underlying, expiration.Date);
if (contractMonthDelta < 0)
{
// For futures that have an expiry after the contract month.
// This is for dairy contracts, which can and do expire after the contract month.
var expirationMonth = expiration.AddDays(-(expiration.Day - 1))
.AddMonths(contractMonthDelta);
month = expirationMonth.Month;
year = doubleDigitsYear ? expirationMonth.Year % 100 : expirationMonth.Year % 10;
}
else
{
// These futures expire in the month before or in the contract month
month += contractMonthDelta;
// Get the month back into the allowable range, allowing for a wrap
// Below is a little algorithm for wrapping numbers with a certain bounds.
// In this case, were dealing with months, wrapping to years once we get to January
// As modulo works for [0, x), it's best to subtract 1 (as months are [1, 12] to convert to [0, 11]),
// do the modulo/integer division, then add 1 back on to get into the correct range again
month--;
year += month / 12;
month %= 12;
month++;
}
var expirationDay = includeExpirationDate ? $"{expiration.Day:00}" : string.Empty;
return $"{underlying}{expirationDay}{FuturesMonthLookup[month]}{year}";
}
/// <summary>
/// Returns option symbol ticker in accordance with OSI symbology
/// More information can be found at http://www.optionsclearing.com/components/docs/initiatives/symbology/symbology_initiative_v1_8.pdf
/// </summary>
/// <param name="symbol">Symbol object to create OSI ticker from</param>
/// <returns>The OSI ticker representation</returns>
public static string GenerateOptionTickerOSI(this Symbol symbol)
{
if (!symbol.SecurityType.IsOption())
{
throw new ArgumentException(
Messages.SymbolRepresentation.UnexpectedSecurityTypeForMethod(nameof(GenerateOptionTickerOSI), symbol.SecurityType));
}
return GenerateOptionTickerOSI(symbol.Underlying.Value, symbol.ID.OptionRight, symbol.ID.StrikePrice, symbol.ID.Date);
}
/// <summary>
/// Returns option symbol ticker in accordance with OSI symbology
/// More information can be found at http://www.optionsclearing.com/components/docs/initiatives/symbology/symbology_initiative_v1_8.pdf
/// </summary>
/// <param name="underlying">Underlying string</param>
/// <param name="right">Option right</param>
/// <param name="strikePrice">Option strike</param>
/// <param name="expiration">Option expiration date</param>
/// <returns>The OSI ticker representation</returns>
public static string GenerateOptionTickerOSI(string underlying, OptionRight right, decimal strikePrice, DateTime expiration)
{
if (underlying.Length > 5) underlying += " ";
return Invariant($"{underlying,-6}{expiration.ToStringInvariant(DateFormat.SixCharacter)}{right.ToStringPerformance()[0]}{(strikePrice * 1000m):00000000}");
}
/// <summary>
/// Returns option symbol ticker in accordance with OSI symbology
/// More information can be found at http://www.optionsclearing.com/components/docs/initiatives/symbology/symbology_initiative_v1_8.pdf
/// </summary>
/// <param name="symbol">Symbol object to create OSI ticker from</param>
/// <returns>The OSI ticker representation</returns>
public static string GenerateOptionTickerOSICompact(this Symbol symbol)
{
// First, validate that the symbol is of the correct security type
if (!symbol.SecurityType.IsOption())
{
throw new ArgumentException(
Messages.SymbolRepresentation.UnexpectedSecurityTypeForMethod(nameof(GenerateOptionTickerOSICompact), symbol.SecurityType));
}
return GenerateOptionTickerOSICompact(symbol.Underlying.Value, symbol.ID.OptionRight, symbol.ID.StrikePrice, symbol.ID.Date);
}
/// <summary>
/// Returns option symbol ticker in accordance with OSI symbology
/// More information can be found at http://www.optionsclearing.com/components/docs/initiatives/symbology/symbology_initiative_v1_8.pdf
/// </summary>
/// <param name="underlying">Underlying string</param>
/// <param name="right">Option right</param>
/// <param name="strikePrice">Option strike</param>
/// <param name="expiration">Option expiration date</param>
/// <returns>The OSI ticker representation</returns>
public static string GenerateOptionTickerOSICompact(string underlying, OptionRight right, decimal strikePrice, DateTime expiration)
{
return Invariant($"{underlying}{expiration.ToStringInvariant(DateFormat.SixCharacter)}{right.ToStringPerformance()[0]}{(strikePrice * 1000m):00000000}");
}
/// <summary>
/// Parses the specified OSI options ticker into a Symbol object
/// </summary>
/// <param name="ticker">The OSI compliant option ticker string</param>
/// <param name="securityType">The security type</param>
/// <param name="market">The associated market</param>
/// <returns>Symbol object for the specified OSI option ticker string</returns>
public static Symbol ParseOptionTickerOSI(string ticker, SecurityType securityType = SecurityType.Option, string market = Market.USA)
{
return ParseOptionTickerOSI(ticker, securityType, OptionStyle.American, market);
}
/// <summary>
/// Parses the specified OSI options ticker into a Symbol object
/// </summary>
/// <param name="ticker">The OSI compliant option ticker string</param>
/// <param name="securityType">The security type</param>
/// <param name="market">The associated market</param>
/// <param name="optionStyle">The option style</param>
/// <returns>Symbol object for the specified OSI option ticker string</returns>
public static Symbol ParseOptionTickerOSI(string ticker, SecurityType securityType, OptionStyle optionStyle, string market)
{
if (!TryDecomposeOptionTickerOSI(ticker, out var optionTicker, out var expiry, out var right, out var strike))
{
throw new FormatException(Messages.SymbolRepresentation.InvalidOSITickerFormat(ticker));
}
SecurityIdentifier underlyingSid;
string underlyingSymbolValue;
if (securityType == SecurityType.Option)
{
underlyingSid = SecurityIdentifier.GenerateEquity(optionTicker, market);
// We have the mapped symbol in the OSI ticker
underlyingSymbolValue = optionTicker;
// let it fallback to it's default handling, which include mapping
optionTicker = null;
}
else if (securityType == SecurityType.IndexOption)
{
underlyingSid = SecurityIdentifier.GenerateIndex(OptionSymbol.MapToUnderlying(optionTicker, securityType), market);
underlyingSymbolValue = underlyingSid.Symbol;
}
else if (securityType == SecurityType.FutureOption)
{
var futureTickerInfo = ParseFutureTicker(optionTicker);
underlyingSid = SecurityIdentifier.GenerateFuture(expiry, futureTickerInfo.Underlying, market);
underlyingSymbolValue = underlyingSid.Symbol;
}
else
{
throw new NotImplementedException($"ParseOptionTickerOSI(): {Messages.SymbolRepresentation.SecurityTypeNotImplemented(securityType)}");
}
var sid = SecurityIdentifier.GenerateOption(expiry, underlyingSid, optionTicker, market, strike, right, optionStyle);
return new Symbol(sid, ticker, new Symbol(underlyingSid, underlyingSymbolValue));
}
/// <summary>
/// Tries to decompose the specified OSI options ticker into its components
/// </summary>
/// <param name="ticker">The OSI option ticker</param>
/// <param name="optionTicker">The option ticker extracted from the OSI symbol</param>
/// <param name="expiry">The option contract expiry date</param>
/// <param name="right">The option contract right</param>
/// <param name="strike">The option contract strike price</param>
/// <returns>True if the OSI symbol was in the right format and could be decomposed</returns>
public static bool TryDecomposeOptionTickerOSI(string ticker, out string optionTicker, out DateTime expiry,
out OptionRight right, out decimal strike)
{
optionTicker = null;
expiry = default;
right = OptionRight.Call;
strike = decimal.Zero;
if (string.IsNullOrEmpty(ticker))
{
return false;
}
var match = _optionTickerRegex.Match(ticker);
if (!match.Success)
{
return false;
}
optionTicker = match.Groups[1].Value;
expiry = DateTime.ParseExact(match.Groups[2].Value, DateFormat.SixCharacter, null);
right = match.Groups[3].Value.ToUpperInvariant() == "C" ? OptionRight.Call : OptionRight.Put;
strike = Parse.Decimal(match.Groups[4].Value) / 1000m;
return true;
}
/// <summary>
/// Tries to decompose the specified OSI options ticker into its components
/// </summary>
/// <param name="ticker">The OSI option ticker</param>
/// <param name="securityType">The option security type</param>
/// <param name="optionTicker">The option ticker extracted from the OSI symbol</param>
/// <param name="underlyingTicker">The underlying ticker</param>
/// <param name="expiry">The option contract expiry date</param>
/// <param name="right">The option contract right</param>
/// <param name="strike">The option contract strike price</param>
/// <returns>True if the OSI symbol was in the right format and could be decomposed</returns>
public static bool TryDecomposeOptionTickerOSI(string ticker, SecurityType securityType, out string optionTicker,
out string underlyingTicker, out DateTime expiry, out OptionRight right, out decimal strike)
{
optionTicker = null;
underlyingTicker = null;
expiry = default;
right = OptionRight.Call;
strike = decimal.Zero;
if (!securityType.IsOption())
{
return false;
}
var result = TryDecomposeOptionTickerOSI(ticker, out optionTicker, out expiry, out right, out strike);
underlyingTicker = securityType != SecurityType.IndexOption ? optionTicker : IndexOptionSymbol.MapToUnderlying(optionTicker);
return result;
}
/// <summary>
/// Function returns option ticker from IQFeed option ticker
/// For example CSCO1220V19 Cisco October Put at 19.00 Expiring on 10/20/12
/// Symbology details: http://www.iqfeed.net/symbolguide/index.cfm?symbolguide=guide&amp;displayaction=support%C2%A7ion=guide&amp;web=iqfeed&amp;guide=options&amp;web=IQFeed&amp;type=stock
/// </summary>
/// <param name="symbol">THe option symbol</param>
/// <returns>The option ticker</returns>
public static string GenerateOptionTicker(Symbol symbol)
{
var symbolTicker = symbol.SecurityType == SecurityType.IndexOption ? symbol.Canonical.Value.Replace("?", string.Empty) : SecurityIdentifier.Ticker(symbol.Underlying, symbol.ID.Date);
var letter = OptionCodeLookup.Where(x => x.Value.Item2 == symbol.ID.OptionRight && x.Value.Item1 == symbol.ID.Date.Month).Select(x => x.Key).Single();
var twoYearDigit = symbol.ID.Date.ToString("yy");
return $"{symbolTicker}{twoYearDigit}{symbol.ID.Date.Day:00}{letter}{symbol.ID.StrikePrice.ToStringInvariant()}";
}
/// <summary>
/// Function returns option contract parameters (underlying name, expiration date, strike, right) from IQFeed option ticker
/// Symbology details: http://www.iqfeed.net/symbolguide/index.cfm?symbolguide=guide&amp;displayaction=support%C2%A7ion=guide&amp;web=iqfeed&amp;guide=options&amp;web=IQFeed&amp;type=stock
/// </summary>
/// <param name="ticker">IQFeed option ticker</param>
/// <returns>Results containing 1) underlying name, 2) option right, 3) option strike 4) expiration date</returns>
public static OptionTickerProperties ParseOptionTickerIQFeed(string ticker)
{
var letterRange = OptionCodeLookup.Keys
.Select(x => x[0])
.ToArray();
var optionTypeDelimiter = ticker.LastIndexOfAny(letterRange);
var strikePriceString = ticker.Substring(optionTypeDelimiter + 1, ticker.Length - optionTypeDelimiter - 1);
var lookupResult = OptionCodeLookup[ticker[optionTypeDelimiter].ToStringInvariant()];
var month = lookupResult.Item1;
var optionRight = lookupResult.Item2;
var dayString = ticker.Substring(optionTypeDelimiter - 2, 2);
var yearString = ticker.Substring(optionTypeDelimiter - 4, 2);
var underlying = ticker.Substring(0, optionTypeDelimiter - 4);
// if we cannot parse strike price, we ignore this contract, but log the information.
Decimal strikePrice;
if (!Decimal.TryParse(strikePriceString, NumberStyles.Any, CultureInfo.InvariantCulture, out strikePrice))
{
return null;
}
int day;
if (!int.TryParse(dayString, out day))
{
return null;
}
int year;
if (!int.TryParse(yearString, out year))
{
return null;
}
var expirationDate = new DateTime(2000 + year, month, day);
return new OptionTickerProperties
{
Underlying = underlying,
OptionRight = optionRight,
OptionStrike = strikePrice,
ExpirationDate = expirationDate
};
}
/// <summary>
/// A dictionary that maps option symbols to a tuple containing the option series number and the option right (Call or Put).
/// The key represents a single character option symbol, and the value contains the series number and the associated option right.
/// </summary>
/// <remarks>
/// The dictionary is designed to map each option symbol (e.g., "A", "M", "B", etc.) to an option series number and
/// the corresponding option right (either a Call or Put). The series number determines the group of options the symbol belongs to,
/// and the option right indicates whether the option is a Call (buyer has the right to buy) or Put (buyer has the right to sell).
/// </remarks>
public static IReadOnlyDictionary<string, Tuple<int, OptionRight>> OptionCodeLookup { get; } = new Dictionary<string, Tuple<int, OptionRight>>
{
{ "A", Tuple.Create(1, OptionRight.Call) }, { "M", Tuple.Create(1, OptionRight.Put) },
{ "B", Tuple.Create(2, OptionRight.Call) }, { "N", Tuple.Create(2, OptionRight.Put) },
{ "C", Tuple.Create(3, OptionRight.Call) }, { "O", Tuple.Create(3, OptionRight.Put) },
{ "D", Tuple.Create(4, OptionRight.Call) }, { "P", Tuple.Create(4, OptionRight.Put) },
{ "E", Tuple.Create(5, OptionRight.Call) }, { "Q", Tuple.Create(5, OptionRight.Put) },
{ "F", Tuple.Create(6, OptionRight.Call) }, { "R", Tuple.Create(6, OptionRight.Put) },
{ "G", Tuple.Create(7, OptionRight.Call) }, { "S", Tuple.Create(7, OptionRight.Put) },
{ "H", Tuple.Create(8, OptionRight.Call) }, { "T", Tuple.Create(8, OptionRight.Put) },
{ "I", Tuple.Create(9, OptionRight.Call) }, { "U", Tuple.Create(9, OptionRight.Put) },
{ "J", Tuple.Create(10, OptionRight.Call) }, { "V", Tuple.Create(10, OptionRight.Put) },
{ "K", Tuple.Create(11, OptionRight.Call) }, { "W", Tuple.Create(11, OptionRight.Put) },
{ "L", Tuple.Create(12, OptionRight.Call) }, { "X", Tuple.Create(12, OptionRight.Put) },
};
/// <summary>
/// Provides a lookup dictionary for mapping futures month codes to their corresponding numeric values.
/// </summary>
public static IReadOnlyDictionary<string, int> FuturesMonthCodeLookup { get; } = new Dictionary<string, int>
{
{ "F", 1 }, // January
{ "G", 2 }, // February
{ "H", 3 }, // March
{ "J", 4 }, // April
{ "K", 5 }, // May
{ "M", 6 }, // June
{ "N", 7 }, // July
{ "Q", 8 }, // August
{ "U", 9 }, // September
{ "V", 10 }, // October
{ "X", 11 }, // November
{ "Z", 12 } // December
};
/// <summary>
/// Provides a lookup dictionary for mapping numeric values to their corresponding futures month codes.
/// </summary>
public static IReadOnlyDictionary<int, string> FuturesMonthLookup { get; } = FuturesMonthCodeLookup.ToDictionary(kv => kv.Value, kv => kv.Key);
/// <summary>
/// Converts a user-provided ticker string into a <see cref="Symbol"/> object,
/// handling different security types such as stocks, options, futures, and index options.
/// </summary>
/// <param name="ticker">The ticker string input by the user.</param>
/// <param name="securityType">The type of security (e.g., Equity, Option, Future).</param>
/// <param name="market">The market or exchange the symbol belongs to (optional for some types).</param>
/// <returns>A <see cref="Symbol"/> representing the specified security.</returns>
public static Symbol ParseTickerFromUserInput(string ticker, SecurityType securityType, string market)
{
if (securityType == SecurityType.Option)
{
return ParseOptionTickerOSI(ticker);
}
else if (securityType == SecurityType.Future)
{
return ParseFutureSymbol(ticker);
}
else if (securityType == SecurityType.FutureOption)
{
return ParseFutureOptionSymbol(ticker);
}
else if (securityType == SecurityType.IndexOption)
{
return ParseOptionTickerOSI(ticker, securityType);
}
return Symbol.Create(ticker, securityType, market);
}
/// <summary>
/// Get the expiration year from short year (two-digit integer).
/// Examples: NQZ23 and NQZ3 for Dec 2023
/// </summary>
/// <param name="futureYear">Clarifies the year for the current future</param>
/// <param name="parsed">Contains useful information about the future expiration year</param>
/// <remarks>Tickers from live trading may not provide the four-digit year.</remarks>
private static int GetExpirationYear(int? futureYear, FutureTickerProperties parsed)
{
if (futureYear.HasValue)
{
var referenceYear = 1900 + parsed.ExpirationYearShort;
while (referenceYear < futureYear.Value)
{
referenceYear += 10;
}
return referenceYear;
}
var currentYear = DateTime.UtcNow.Year;
if (parsed.ExpirationYearShortLength > 1)
{
// we are given a double digit year
return 2000 + parsed.ExpirationYearShort;
}
var baseYear = ((int)Math.Floor(currentYear / 10.0)) * 10 + parsed.ExpirationYearShort;
while (baseYear < currentYear)
{
baseYear += 10;
}
return baseYear;
}
}
}