def test_rebalancing2(self):
"""
Test rebalancing algorithm. Part 2.
Cash is not in the same currency as the assets.
"""
p = Portfolio()
p.add_cash(200., "USD")
p.add_cash(250., "GBP")
tickers = ["VCN.TO", "XAW.TO", "ZAG.TO"]
quantities = [5, 12, 20]
p.easy_add_assets(tickers=tickers, quantities=quantities)
target_asset_alloc = {
"VCN.TO": 40.0,
"ZAG.TO": 40.0,
"XAW.TO": 20.0,
}
initial_value = p.value("CAD")
p.selling_allowed = False
(_, prices, _, _) = p.rebalance(target_asset_alloc, verbose=True)
final_value = p.value("CAD")
self.assertAlmostEqual(initial_value, final_value, -1)
# The prices should be in the tickers' currency
for ticker in tickers:
self.assertEqual(prices[ticker][1], "CAD")
# Since there was no CAD to start off with,
# there should be none after rebalacing either
# (i.e. amount converted to CAD should be the amount used to purchase CAD assets)
self.assertAlmostEqual(p.cash["CAD"].amount, 0., 1)
def test_portfolio_value(self):
"""
Test total market value, total cash value, and total value methods.
"""
p = Portfolio()
tickers = ["VCN.TO", "ZAG.TO", "XAW.TO", "TSLA"]
quantities = [2, 20, 10, 4]
p.easy_add_assets(tickers=tickers, quantities=quantities)
mv = p.market_value("CAD")
total_mv = np.sum(
[asset.market_value_in("CAD") for asset in p.assets.values()])
self.assertAlmostEqual(mv, total_mv, 1)
amounts = [500.15, 200.00]
currencies = ["CAD", "USD"]
p.easy_add_cash(amounts, currencies)
cv = p.cash_value("CAD")
usd_to_cad = CurrencyRates().get_rate("USD", "CAD")
total_cv = np.sum(amounts[0] + amounts[1] * usd_to_cad)
self.assertAlmostEqual(cv, total_cv, 1)
self.assertAlmostEqual(p.value("CAD"), total_mv + total_cv, 1)
def test_rebalancing(self):
"""
Test rebalancing algorithm.
This might break over time as prices increase.
If we have enough cash though, the optimizer should ideally
be able to match the target asset allocation
pretty closely
"""
p = Portfolio()
tickers = ["XBB.TO", "XIC.TO", "ITOT", "IEFA", "IEMG"]
quantities = [36, 64, 32, 8, 7]
p.easy_add_assets(tickers=tickers, quantities=quantities)
p.add_cash(3000, "USD")
p.add_cash(515.21, "CAD")
p.add_cash(5.00, "GBP")
p.selling_allowed = True
self.assertTrue(p.selling_allowed)
# different order than tickers.
# rebalance method should be able to handle such a case
target_asset_alloc = {
"XBB.TO": 20,
"XIC.TO": 20,
"IEFA": 20,
"ITOT": 36,
"IEMG": 4
}
initial_value = p.value("CAD")
(_, _, _, max_diff) = p.rebalance(target_asset_alloc, verbose=True)
final_value = p.value("CAD")
self.assertAlmostEqual(initial_value, final_value, 1)
self.assertLessEqual(max_diff, 2.)
# Error handling
with self.assertRaises(Exception):
target_asset_alloc = {
"XBB.TO": 20,
"XIC.TO": 20,
"IEFA": 20,
}
p.rebalance(target_asset_alloc)
from rebalance import Portfolio
p = Portfolio()
tickers = ["XBB.TO", "XIC.TO", "ITOT", "IEFA", "IEMG"]
quantities = [36, 64, 32, 8, 7]
p.easy_add_assets(tickers=tickers, quantities = quantities)
p.add_cash(5000.00, "GBP")
p.add_cash(1000.00, "EUR")
target_asset_alloc = {
"XBB.TO": 20,
"XIC.TO": 20,
"IEFA": 20,
"ITOT": 36,
"IEMG": 4
}
initial_value = p.value("CAD")
p.selling_allowed = False
(_, _, exchange_rates, _) = p.rebalance(target_asset_alloc, verbose=True)
final_value = p.value("CAD")