def recalculate_stock_values_into_base(self):
from .currency import CurrencyConverter<EOL>conv = CurrencyConverter()<EOL>cash = self.model.get_cash_asset_class()<EOL>for stock in self.model.stocks:<EOL><INDENT>if stock.currency != self.base_currency:<EOL><INDENT>conv.load_currency(stock.currency)<EOL>assert isinstance(stock.value, Decimal)<EOL>val_base = stock.value * conv.rate.value<EOL><DEDENT>else:<EOL><INDENT>val_base = stock.value<EOL><DEDENT>stock.value_in_base_currency = val_base<EOL><DEDENT>
Loads the exchange rates and recalculates stock holding values into 
        base currency