Momentum and Asset Growth Long-Short Strategy with January Exclusion

from AlgoLib import *
import numpy as np
from pandas.core.frame import DataFrame
from pandas.core.series import Series

class MomentumFactorAssetGrowthEffect(XXX):

def Initialize(self) -> None:
self.SetStartDate(2000, 1, 1)
self.SetCash(100_000)

self.UniverseSettings.Leverage = 5
self.UniverseSettings.Resolution = Resolution.Daily
self.AddUniverse(self.FundamentalSelectionFunction)
self.Settings.MinimumOrderMarginPortfolioPercentage = 0.0

self.exchange_codes: list[str] = ['NYS', 'NAS', 'ASE']
self.fundamental_count: int = 1_000
self.fundamental_sorting_key = lambda x: x.MarketCap
self.months_in_year: int = 12
self.days_in_month: int = 21
self.total_assets_history_period: int = 2
self.decile: int = 10
self.quintile: int = 5
self.excluded_month: int = 1

# Monthly close prices and total assets
self.symbol_data: dict[Symbol, SymbolData] = {}
self.long_symbols: dict[Symbol] = []
self.short_symbols: dict[Symbol] = []
self.selection_flag: bool = False

market: Symbol = self.AddEquity('SPY', Resolution.Daily).Symbol        
self.Schedule.On(self.DateRules.MonthStart(market), 
                self.TimeRules.AfterMarketOpen(market), 
                self.Selection)

def FundamentalSelectionFunction(self, fundamental: List[Fundamental]) -> List[Symbol]:
if not self.selection_flag:
    return Universe.Unchanged

# Update the rolling window every month.
for security in fundamental:
    if security.Symbol in self.symbol_data:
        self.symbol_data[security.Symbol].update_price(security.AdjustedPrice)

filtered: list[Fundamental] = [f for f in fundamental if f.HasFundamentalData
                                and f.SecurityReference.ExchangeId in self.exchange_codes
                                and not np.isnan(f.FinancialStatements.BalanceSheet.TotalAssets.TwelveMonths)
                                and f.FinancialStatements.BalanceSheet.TotalAssets.TwelveMonths > 0]

sorted_filter: List[Fundamental] = sorted(filtered, 
                                        key=self.fundamental_sorting_key, 
                                        reverse=True)[:self.fundamental_count]

# Warmup price rolling windows.
for f in sorted_filter:
    if f.Symbol in self.symbol_data:
        continue
    
    self.symbol_data[f.Symbol] = SymbolData(f.Symbol, self.months_in_year, self.total_assets_history_period)
    history: DataFrame = self.History(f.Symbol, self.months_in_year * self.days_in_month, Resolution.Daily)
    if history.empty:
        self.Log(f"Not enough data for {f.Symbol} yet.")
        continue
    closes: Series = history.loc[f.Symbol].close
    
    # Find monthly closes.
    for index, time_close in enumerate(closes.iteritems()):
        # index out of bounds check.
        if index + 1 < len(closes.keys()):
            date_month = time_close[0].date().month
            next_date_month = closes.keys()[index + 1].month
        
            # Find last day of month.
            if date_month != next_date_month:
                self.symbol_data[f.Symbol].update_price(time_close[1])
    
ready_securities: list[Fundamental] = [x for x in sorted_filter if self.symbol_data[x.Symbol].price_is_ready()]

# Asset growth calc.
asset_growth: dict[Symbol, float] = {}
for security in ready_securities:
    if self.symbol_data[security.Symbol].asset_data_is_ready():
        asset_growth[security.Symbol] = self.symbol_data[security.Symbol].asset_growth()
        
    self.symbol_data[security.Symbol].update_assets(security.FinancialStatements.BalanceSheet.TotalAssets.TwelveMonths)

sorted_by_growth: list[tuple[Symbol, float]] = sorted(asset_growth.items(), key=lambda x: x[1], reverse=True)
decile: int = int(len(sorted_by_growth) / self.decile)
top_by_growth: list[Symbol] = [x[0] for x in sorted_by_growth][:decile]

performance: dict[Symbol, float] = {x: self.symbol_data[x].performance() for x in top_by_growth}
sorted_by_performance: list[tuple[Symbol, float]] = sorted(performance.items(), key=lambda x: x[1], reverse=True)
quintile = int(len(sorted_by_performance) / self.quintile)
self.long_symbols = [x[0] for x in sorted_by_performance][:quintile]
self.short_symbols = [x[0] for x in sorted_by_performance][-quintile:]

return self.long_symbols + self.short_symbols

def OnSecuritiesChanged(self, changes: SecurityChanges) -> None:
for security in changes.AddedSecurities:
    security.SetFeeModel(CustomFeeModel())

def OnData(self, slice: Slice) -> None:
if not self.selection_flag:
    return
self.selection_flag = False

# Trade execution.
targets: List[PortfolioTarget] = []
for i, portfolio in enumerate([self.long_symbols, self.short_symbols]):
    for symbol in portfolio:
        if slice.ContainsKey(symbol) and slice[symbol] is not None:
            targets.append(PortfolioTarget(symbol, ((-1) ** i) / len(portfolio)))

self.SetHoldings(targets, True)
self.long_symbols.clear()
self.short_symbols.clear()

def Selection(self) -> None:
# Exclude January trading.
if self.Time.month != self.excluded_month:
    self.selection_flag = True
else:
    self.Liquidate()

class SymbolData():
def __init__(self, symbol: Symbol, period: int, total_assets_history_period: int) -> None:
self.Symbol: Symbol = symbol
self.Price: RollingWindow = RollingWindow[float](period)
self.TotalAssets: RollingWindow = RollingWindow[float](total_assets_history_period)

def update_price(self, value) -> None:
self.Price.Add(value)

def update_assets(self, assets_value) -> None:
self.TotalAssets.Add(assets_value)

def asset_data_is_ready(self) -> bool:
return self.TotalAssets.IsReady

def asset_growth(self) -> float:
asset_values: list[float] = [x for x in self.TotalAssets]
return (asset_values[0] - asset_values[1]) / asset_values[1]

def price_is_ready(self) -> bool:
return self.Price.IsReady

# Performance, one month skipped.
def performance(self, values_to_skip: int = 1) -> float:
closes: list[float] = [x for x in self.Price][values_to_skip:]
return (closes[0] / closes[-1] - 1)

# Custom fee model
class CustomFeeModel(FeeModel):
def GetOrderFee(self, parameters: OrderFeeParameters) -> OrderFee:
fee: float = parameters.Security.Price * parameters.Order.AbsoluteQuantity * 0.00005
return OrderFee(CashAmount(fee, "USD"))