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quantconnect--lean/Algorithm.Python/SetHoldingsMultipleTargetsRegressionAlgorithm.py
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2026-07-13 13:02:50 +08:00

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Python

# QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
# Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from AlgorithmImports import *
### <summary>
### Regression algorithm testing GH feature 3790, using SetHoldings with a collection of targets
### which will be ordered by margin impact before being executed, with the objective of avoiding any
### margin errors
### </summary>
class SetHoldingsMultipleTargetsRegressionAlgorithm(QCAlgorithm):
def initialize(self):
'''Initialise the data and resolution required, as well as the cash and start-end dates for your algorithm. All algorithms must initialized.'''
self.set_start_date(2013,10, 7)
self.set_end_date(2013,10,11)
# use leverage 1 so we test the margin impact ordering
self._spy = self.add_equity("SPY", Resolution.MINUTE, Market.USA, False, 1).symbol
self._ibm = self.add_equity("IBM", Resolution.MINUTE, Market.USA, False, 1).symbol
# Order margin value has to have a minimum of 0.5% of Portfolio value, allows filtering out small trades and reduce fees.
# Commented so regression algorithm is more sensitive
#self.settings.minimum_order_margin_portfolio_percentage = 0.005
def on_data(self, data):
'''OnData event is the primary entry point for your algorithm. Each new data point will be pumped in here.
Arguments:
data: Slice object keyed by symbol containing the stock data
'''
if not self.portfolio.invested:
self.set_holdings([PortfolioTarget(self._spy, 0.8), PortfolioTarget(self._ibm, 0.2)])
else:
self.set_holdings([PortfolioTarget(self._ibm, 0.8), PortfolioTarget(self._spy, 0.2)])