chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
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+/*
+ * 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.
+*/
+
+namespace QuantConnect.Securities
+{
+    /// <summary>
+    /// Represents a simple, constant margin model by specifying the percentages of required margin.
+    /// </summary>
+    public class SecurityMarginModel : BuyingPowerModel
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SecurityMarginModel"/> with no leverage (1x)
+        /// </summary>
+        public SecurityMarginModel()
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SecurityMarginModel"/>
+        /// </summary>
+        /// <param name="initialMarginRequirement">The percentage of an order's absolute cost
+        /// that must be held in free cash in order to place the order</param>
+        /// <param name="maintenanceMarginRequirement">The percentage of the holding's absolute
+        /// cost that must be held in free cash in order to avoid a margin call</param>
+        /// <param name="requiredFreeBuyingPowerPercent">The percentage used to determine the required
+        /// unused buying power for the account.</param>
+        public SecurityMarginModel(
+            decimal initialMarginRequirement,
+            decimal maintenanceMarginRequirement,
+            decimal requiredFreeBuyingPowerPercent
+            )
+            : base(initialMarginRequirement, maintenanceMarginRequirement, requiredFreeBuyingPowerPercent)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SecurityMarginModel"/>
+        /// </summary>
+        /// <param name="leverage">The leverage</param>
+        /// <param name="requiredFreeBuyingPowerPercent">The percentage used to determine the required
+        /// unused buying power for the account.</param>
+        public SecurityMarginModel(decimal leverage, decimal requiredFreeBuyingPowerPercent = 0)
+            : base(leverage, requiredFreeBuyingPowerPercent)
+        {
+        }
+    }
+}