/// <summary> /// Creates a new factor file with the specified data applied. /// Only <see cref="Dividend"/> and <see cref="Split"/> data types /// will be used. /// </summary> /// <param name="data">The data to apply</param> /// <param name="exchangeHours">Exchange hours used for resolving the previous trading day</param> /// <returns>A new factor file that incorporates the specified dividend</returns> public CorporateFactorProvider Apply(List <BaseData> data, SecurityExchangeHours exchangeHours) { if (data.Count == 0) { return(this); } var factorFileRows = new List <CorporateFactorRow>(); var firstEntry = SortedFactorFileData.First().Value.First(); var lastEntry = SortedFactorFileData.Last().Value.First(); factorFileRows.Add(lastEntry); var splitsAndDividends = GetSplitsAndDividends(data[0].Symbol, exchangeHours); var combinedData = splitsAndDividends.Concat(data) .DistinctBy(e => $"{e.GetType().Name}{e.Time.ToStringInvariant(DateFormat.EightCharacter)}") .OrderByDescending(d => d.Time.Date); foreach (var datum in combinedData) { CorporateFactorRow nextEntry = null; var split = datum as Split; var dividend = datum as Dividend; if (dividend != null) { nextEntry = lastEntry.Apply(dividend, exchangeHours); lastEntry = nextEntry; } else if (split != null) { nextEntry = lastEntry.Apply(split, exchangeHours); lastEntry = nextEntry; } if (nextEntry != null) { // overwrite the latest entry -- this handles splits/dividends on the same date if (nextEntry.Date == factorFileRows.Last().Date) { factorFileRows[factorFileRows.Count - 1] = nextEntry; } else { factorFileRows.Add(nextEntry); } } } var firstFactorFileRow = new CorporateFactorRow(firstEntry.Date, factorFileRows.Last().PriceFactor, factorFileRows.Last().SplitFactor, firstEntry.ReferencePrice == 0 ? 0 : firstEntry.ReferencePrice); var existing = factorFileRows.FindIndex(row => row.Date == firstFactorFileRow.Date); if (existing == -1) { // only add it if not present factorFileRows.Add(firstFactorFileRow); } return(new CorporateFactorProvider(Permtick, factorFileRows, FactorFileMinimumDate)); }
/// <summary> /// Writes this factor file data to an enumerable of csv lines /// </summary> /// <returns>An enumerable of lines representing this factor file</returns> public IEnumerable <string> ToCsvLines() { if (FactorFileMinimumDate != null) { var min = SortedFactorFileData.First().Value; yield return($"{FactorFileMinimumDate:yyyyMMdd},{min.PriceFactor},{min.SplitFactor}"); } foreach (var kvp in SortedFactorFileData) { yield return($"{kvp.Key:yyyyMMdd},{kvp.Value.PriceFactor},{kvp.Value.SplitFactor}"); } }