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@ -8,7 +8,9 @@ from typing import Literal |
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from pyfacts.core import date_parser |
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from .pyfacts import TimeSeries |
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from .utils import _interval_to_years, covariance |
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from .utils import _interval_to_years, _preprocess_from_to_date, covariance |
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# from dateutil.relativedelta import relativedelta |
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@date_parser(3, 4) |
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@ -540,10 +542,21 @@ def sortino_ratio( |
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interval_days = math.ceil(_interval_to_years(return_period_unit, return_period_value) * 365) |
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if from_date is None: |
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from_date = time_series_data.start_date + datetime.timedelta(days=interval_days) |
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if to_date is None: |
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to_date = time_series_data.end_date |
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# if from_date is None: |
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# from_date = time_series_data.start_date + relativedelta(**{return_period_unit: return_period_value}) |
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# if to_date is None: |
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# to_date = time_series_data.end_date |
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from_date, to_date = _preprocess_from_to_date( |
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from_date, |
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to_date, |
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time_series_data, |
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False, |
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return_period_unit, |
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return_period_value, |
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as_on_match, |
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prior_match, |
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closest, |
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) |
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if risk_free_data is None and risk_free_rate is None: |
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raise ValueError("At least one of risk_free_data or risk_free rate is required") |
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@ -566,7 +579,8 @@ def sortino_ratio( |
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annualized_average_rr = (1 + average_rr) ** (365 / interval_days) - 1 |
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excess_returns = annualized_average_rr - risk_free_rate |
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sd = statistics.stdev([i for i in average_rr_ts.values if i < 0]) |
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my_list = [i for i in average_rr_ts.values if i < 0] |
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sd = statistics.stdev(my_list) # [i for i in average_rr_ts.values if i < 0]) |
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sd *= math.sqrt(365 / interval_days) |
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sortino_ratio_value = excess_returns / sd |
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