diff --git a/src/bnhtrade.Core/Model/Stock/StockJournal.cs b/src/bnhtrade.Core/Model/Stock/StockJournal.cs
new file mode 100644
index 0000000..8627a67
--- /dev/null
+++ b/src/bnhtrade.Core/Model/Stock/StockJournal.cs
@@ -0,0 +1,105 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace bnhtrade.Core.Model.Stock
+{
+    public class StockJournal : IValidatableObject
+    {
+        public StockJournal(int stockJournalId, StockJournalType stockJournalType, int stockId, int stockNumber, DateTime entryDate, DateTime postDate, DateTime lastModified, bool isLocked, List<JournalPost> journalPosts)
+        {
+            StockJournalId = stockJournalId;
+            StockJournalType = stockJournalType;
+            StockId = stockId;
+            StockNumber = stockNumber;
+            EntryDate = entryDate;
+            PostDate = postDate;
+            LastModified = lastModified;
+            IsLocked = isLocked;
+            JournalPosts = journalPosts ?? throw new ArgumentNullException(nameof(journalPosts), "Journal posts cannot be null.");
+        }
+
+        public int StockJournalId { get; }
+
+        public StockJournalType StockJournalType { get; }
+
+        public int StockId { get; }
+
+        public int StockNumber { get; }
+
+        public DateTime EntryDate { get; }
+
+        public DateTime PostDate { get; }
+
+        public DateTime LastModified { get; }
+
+        public bool IsLocked { get; }
+
+        public List<JournalPost> JournalPosts { get; }
+
+        public class JournalPost
+        {
+            public JournalPost(int journalPostId, Status status, int quantity)
+            {
+                JournalPostId = journalPostId;
+                Status = status;
+                Quantity = quantity;
+            }
+
+            public int JournalPostId { get; }
+
+            [Required()]
+            public Status Status { get; }
+
+            [Required()]
+            public int Quantity { get; }
+
+            public bool IsCredit
+            {
+                get
+                {
+                    if (Quantity < 0)
+                    {
+                        return true;
+                    }
+                    else if (Quantity > 0)
+                    {
+                        return false;
+                    }
+                    else
+                    {
+                        throw new InvalidOperationException("Quantity cannot be zero for a journal post.");
+                    }
+                }
+            }
+
+            public bool IsDebit
+            {
+                get
+                {
+                    if (Quantity > 0)
+                    {
+                        return true;
+                    }
+                    else if (Quantity < 0)
+                    {
+                        return false;
+                    }
+                    else
+                    {
+                        throw new InvalidOperationException("Quantity cannot be zero for a journal post.");
+                    }
+                }
+            }
+        }
+
+        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+        {
+            throw new NotImplementedException();
+        }
+
+    }
+}
diff --git a/src/bnhtrade.Core/Model/Stock/StockJournalType.cs b/src/bnhtrade.Core/Model/Stock/StockJournalType.cs
new file mode 100644
index 0000000..4821394
--- /dev/null
+++ b/src/bnhtrade.Core/Model/Stock/StockJournalType.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace bnhtrade.Core.Model.Stock
+{
+    public class StockJournalType
+    {
+    }
+}