diff --git a/app/assets/javascripts/repositories/stock.js b/app/assets/javascripts/repositories/stock.js
index 30efdd7ad..4e08ba0b6 100644
--- a/app/assets/javascripts/repositories/stock.js
+++ b/app/assets/javascripts/repositories/stock.js
@@ -4,8 +4,8 @@ var RepositoryStockValues = (function() {
   const UNIT_SELECTOR = '#repository-stock-value-units';
 
   function formatDecimalValue(value, decimals) {
-    let regexp = decimals === 0 ? /[^0-9]/g : /[^0-9.]/g;
-    return value.replace(regexp, '').match(new RegExp(`^\\d*(\\.\\d{0,${decimals}})?`))[0];
+    let regexp = decimals === 0 ? /[^-0-9]/g : /[^-0-9.]/g;
+    return value.replace(regexp, '').match(new RegExp(`^-?\\d*(\\.\\d{0,${decimals}})?`))[0];
   }
 
   function updateChangeAmount($element) {
@@ -36,6 +36,7 @@ var RepositoryStockValues = (function() {
     $('#change_amount').val(inputAmount);
 
     $('#repository_stock_value_amount').val(newAmount);
+    $('.stock-final-container').toggleClass('negative', newAmount < 0);
     $('.stock-final-container .value').text(
       formatDecimalValue(String(newAmount), $('#stock-input-amount').data('decimals'))
     );
diff --git a/app/assets/stylesheets/repository/stock_modal.scss b/app/assets/stylesheets/repository/stock_modal.scss
index 1970db839..c20cd68b1 100644
--- a/app/assets/stylesheets/repository/stock_modal.scss
+++ b/app/assets/stylesheets/repository/stock_modal.scss
@@ -32,6 +32,12 @@
         @include font-small;
       }
 
+      &.negative {
+        .value {
+          color: $brand-danger;
+        }
+      }
+
       &.error {
         .value {
           color: $brand-danger;
diff --git a/app/models/my_module_repository_row.rb b/app/models/my_module_repository_row.rb
index b5c87762f..46a10b9d5 100644
--- a/app/models/my_module_repository_row.rb
+++ b/app/models/my_module_repository_row.rb
@@ -1,4 +1,6 @@
 class MyModuleRepositoryRow < ApplicationRecord
+  include ActionView::Helpers::NumberHelper
+
   attr_accessor :last_modified_by
   attr_accessor :comment
 
@@ -33,6 +35,16 @@ class MyModuleRepositoryRow < ApplicationRecord
     end
   end
 
+  def formated_stock_consumption
+    if stock_consumption
+      number_with_precision(
+        stock_consumption,
+        precision: (repository_row.repository.repository_stock_column.metadata['decimals'].to_i || 0),
+        strip_insignificant_zeros: true
+      )
+    end
+  end
+
   private
 
   def nulify_stock_consumption
diff --git a/app/views/my_modules/repositories/_consume_stock_modal_content.html.erb b/app/views/my_modules/repositories/_consume_stock_modal_content.html.erb
index 841055214..ac2d6949f 100644
--- a/app/views/my_modules/repositories/_consume_stock_modal_content.html.erb
+++ b/app/views/my_modules/repositories/_consume_stock_modal_content.html.erb
@@ -17,7 +17,7 @@
       <div class="sci-input-container" data-error-text="<%= t('repository_stock_values.manage_modal.amount_error') %>">
         <%= f.label :stock_consumption, t('my_modules.repository.stock_modal.amount') %>
         <%= f.text_field :stock_consumption,
-                         value: @module_repository_row.stock_consumption,
+                         value: @module_repository_row.formated_stock_consumption,
                          tabindex: 1,
                          placeholder: t('my_modules.repository.stock_modal.consumed') ,
                          class: 'sci-input-field',
@@ -36,7 +36,7 @@
         <div class="stock-update-view">
           <div class="stock-initial-container">
             <span class="subtitle"><%= t('repository_stock_values.manage_modal.current_stock') %></span>
-            <span class="value"><%= @stock_value.amount %></span>
+            <span class="value"><%= @stock_value.formatted_value %></span>
             <span class="units"><%= @stock_value.repository_stock_unit_item&.data %></span>
           </div>
           <div class="stock-arrow">
diff --git a/app/views/repository_stock_values/_manage_modal_content.html.erb b/app/views/repository_stock_values/_manage_modal_content.html.erb
index 8d4d0da24..ea9357d92 100644
--- a/app/views/repository_stock_values/_manage_modal_content.html.erb
+++ b/app/views/repository_stock_values/_manage_modal_content.html.erb
@@ -114,7 +114,7 @@
       <div class="row">
         <div class="col-sm-12">
           <div class="stock-update-view">
-            <div class="stock-initial-container">
+            <div class="stock-initial-container <%= 'negative' if repository_stock_value.amount.negative? %>">
               <span class="subtitle"><%= t('repository_stock_values.manage_modal.current_stock') %></span>
               <span class="value"><%= repository_stock_value.formatted_value %></span>
               <span class="units"><%= repository_stock_value.repository_stock_unit_item&.data %></span>
@@ -122,7 +122,7 @@
             <div class="stock-arrow">
               <i class="fas fa-arrow-right"></i>
             </div>
-            <div class="stock-final-container">
+            <div class="stock-final-container <%= 'negative' if repository_stock_value.amount.negative? %> ">
               <span class="subtitle"><%= t('repository_stock_values.manage_modal.new_stock') %></span>
               <span class="value"><%= repository_stock_value.formatted_value %></span>
               <span class="units"><%= repository_stock_value.repository_stock_unit_item&.data %></span>
diff --git a/spec/controllers/repository_stock_value_controller.rb b/spec/controllers/repository_stock_value_controller.rb
new file mode 100644
index 000000000..d505f82f8
--- /dev/null
+++ b/spec/controllers/repository_stock_value_controller.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RepositoryStockValuesController, type: :controller do
+  before :all do
+    ApplicationSettings.instance.update(
+      values: ApplicationSettings.instance.values.merge({"stock_management_enabled" => true})
+    )
+  end
+
+  login_user
+  let!(:user) { controller.current_user }
+  let!(:team) { create :team, created_by: user }
+  let!(:user_team) { create :user_team, :admin, team: team, user: user }
+  let!(:repository) { create :repository, team: team, created_by: user }
+  let(:repository_column) do
+    create :repository_column, :stock_type, created_by: user, repository: repository
+  end
+
+  let!(:repository_row) do
+    create :repository_row, repository: repository,
+                            created_by: user,
+                            last_modified_by: user
+  end
+
+  let!(:repository_stock_unit_item) {create :repository_stock_unit_item, created_by: user,
+                                                                         last_modified_by: user,
+                                                                         repository_column: repository_column}                                                               
+
+  describe 'create' do
+    let(:params) do {
+      repository_stock_value: {
+        amount: 10,
+        unit_item_id: repository_stock_unit_item.id,
+        comment: 'test',
+        low_stock_threshold: ''
+      }, 
+      operator: 'set',
+      change_amount: 0,
+      repository_id: repository.id,
+      id: repository_row.id
+    }
+    end
+
+    let(:action) { post :create_or_update, params: params, format: :json }
+    let(:action1) { post :create_or_update, params: params, format: :json }
+
+    it 'Create stock value' do
+      expect { action }.to change(RepositoryLedgerRecord, :count).by(1)
+    end
+
+    it 'Ledger immutability' do
+      action
+      expect { action1 }
+        .to (change(RepositoryLedgerRecord, :count).by(1)
+              .and(change(RepositoryStockValue, :count).by(0)))
+    end
+  end
+end
diff --git a/spec/factories/repository_ledger_record.rb b/spec/factories/repository_ledger_record.rb
new file mode 100644
index 000000000..8fa5d4a2e
--- /dev/null
+++ b/spec/factories/repository_ledger_record.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :repository_ledger_record do
+    repository_stock_value
+    association :reference, factory: :repository_row
+    user
+  end
+end
+
diff --git a/spec/models/my_module_repository_row_spec.rb b/spec/models/my_module_repository_row_spec.rb
index 5b794d864..79c6aac08 100644
--- a/spec/models/my_module_repository_row_spec.rb
+++ b/spec/models/my_module_repository_row_spec.rb
@@ -5,6 +5,16 @@ require 'rails_helper'
 describe MyModuleRepositoryRow, type: :model do
   let(:my_module_repository_row) { build :mm_repository_row }
 
+  let(:user) { create :user }
+  let(:repository_stock_value) { create :repository_stock_value }
+
+  let(:repository_row) { create :repository_row, repository_stock_value: repository_stock_value }
+  let(:my_module_repository_row_stock) { create :mm_repository_row,
+                                                 repository_row: repository_row,
+                                                 assigned_by: user,
+                                                 last_modified_by: user
+                                        }
+
   it 'is valid' do
     expect(my_module_repository_row).to be_valid
   end
@@ -16,6 +26,8 @@ describe MyModuleRepositoryRow, type: :model do
   describe 'Database table' do
     it { should have_db_column :id }
     it { should have_db_column :repository_row_id }
+    it { should have_db_column :repository_stock_unit_item_id }
+    it { should have_db_column :stock_consumption }
     it { should have_db_column :my_module_id }
     it { should have_db_column :assigned_by_id }
     it { should have_db_column :created_at }
@@ -24,7 +36,16 @@ describe MyModuleRepositoryRow, type: :model do
 
   describe 'Relations' do
     it { should belong_to(:my_module) }
+    it { should belong_to(:repository_stock_unit_item).optional }
     it { should belong_to(:assigned_by).class_name('User').optional }
     it { should belong_to(:repository_row) }
   end
+
+  describe 'Repository ledger record' do
+    it 'Ledger creation on changed consumption' do
+      my_module_repository_row_stock.stock_consumption = 10.0
+      expect { my_module_repository_row_stock.save! }
+        .to change(RepositoryLedgerRecord, :count).by(1)
+    end
+  end
 end
diff --git a/spec/models/repository_cell_spec.rb b/spec/models/repository_cell_spec.rb
index 8ba01fc42..f89ed0621 100644
--- a/spec/models/repository_cell_spec.rb
+++ b/spec/models/repository_cell_spec.rb
@@ -10,6 +10,7 @@ describe RepositoryCell, type: :model do
   let(:repository_cell_a) { build :repository_cell, :asset_value }
   let(:repository_cell_s) { build :repository_cell, :status_value }
   let(:repository_cell_d_r) { build :repository_cell, :date_time_range_value }
+  let(:repository_cell_s_v) { build :repository_cell, :stock_value }
 
   context 'when do not have value' do
     it 'is not valid' do
@@ -41,6 +42,10 @@ describe RepositoryCell, type: :model do
     it 'is valid for date time range value' do
       expect(repository_cell_d_r).to be_valid
     end
+
+    it 'is valid for stock value' do
+      expect(repository_cell_s_v).to be_valid
+    end
   end
 
   it 'should be of class RepositoryCell' do
diff --git a/spec/models/repository_ledger_record_spec.rb b/spec/models/repository_ledger_record_spec.rb
new file mode 100644
index 000000000..1ab16846f
--- /dev/null
+++ b/spec/models/repository_ledger_record_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RepositoryLedgerRecord, type: :model do
+  let(:repository_ledger_record) { build :repository_ledger_record }
+  let(:repository_stock_value_new) { build :repository_stock_value }
+
+  it 'is valid' do
+    expect(repository_ledger_record).to be_valid
+  end
+
+  it 'should be of class RepositoryLedgerRecord' do
+    expect(subject.class).to eq RepositoryLedgerRecord
+  end
+
+  describe 'Database table' do
+    it { should have_db_column :id }
+    it { should have_db_column :repository_stock_value_id }
+    it { should have_db_column :reference_id }
+    it { should have_db_column :reference_type }
+    it { should have_db_column :amount }
+    it { should have_db_column :balance }
+    it { should have_db_column :user_id }
+    it { should have_db_column :comment }
+    it { should have_db_column :created_at }
+    it { should have_db_column :updated_at }
+  end
+
+  describe 'Associations' do
+    it { should belong_to(:repository_stock_value).optional }
+    it { should belong_to(:reference) }
+    it { should belong_to(:user) }
+  end
+end
diff --git a/spec/models/repository_stock_unit_item_spec.rb b/spec/models/repository_stock_unit_item_spec.rb
new file mode 100644
index 000000000..4387afc1e
--- /dev/null
+++ b/spec/models/repository_stock_unit_item_spec.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RepositoryStockUnitItem, type: :model do
+  let(:repository_stock_unit_item) { build :repository_stock_unit_item }
+
+  it 'is valid' do
+    expect(repository_stock_unit_item).to be_valid
+  end
+
+  it 'should be of class RepositoryStockUnitItem' do
+    expect(subject.class).to eq RepositoryStockUnitItem
+  end
+
+  describe 'Database table' do
+    it { should have_db_column :id }
+    it { should have_db_column :data }
+    it { should have_db_column :repository_column_id }
+    it { should have_db_column :created_by_id }
+    it { should have_db_column :last_modified_by_id }
+    it { should have_db_column :created_at }
+    it { should have_db_column :updated_at }
+  end
+
+  describe 'Associations' do
+    it { should belong_to(:repository_column) }
+    it { should belong_to(:created_by) }
+    it { should belong_to(:last_modified_by) }
+  end
+
+end
diff --git a/spec/models/repository_stock_value_spec.rb b/spec/models/repository_stock_value_spec.rb
new file mode 100644
index 000000000..39b1d25e7
--- /dev/null
+++ b/spec/models/repository_stock_value_spec.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RepositoryStockValue, type: :model do
+  let(:repository_stock_value) { build :repository_stock_value }
+  let(:repository) { build :repository }
+  let(:user) { build :user }
+
+
+  it 'is valid' do
+    expect(repository_stock_value).to be_valid
+  end
+
+  it 'should be of class RepositoryStockValue' do
+    expect(subject.class).to eq RepositoryStockValue
+  end
+
+  describe 'Database table' do
+    it { should have_db_column :id }
+    it { should have_db_column :amount }
+    it { should have_db_column :repository_stock_unit_item_id }
+    it { should have_db_column :type }
+    it { should have_db_column :last_modified_by_id }
+    it { should have_db_column :created_by_id }
+    it { should have_db_column :created_at }
+    it { should have_db_column :updated_at }
+    it { should have_db_column :low_stock_threshold }
+  end
+
+  describe 'Associations' do
+    it { is_expected.to belong_to(:repository_stock_unit_item).optional }
+    it { is_expected.to belong_to(:created_by).optional }
+    it { is_expected.to belong_to(:last_modified_by).optional }
+  end
+
+
+  describe 'Saving stock value' do
+    let(:repository_stock_value1) { build :repository_stock_value }
+    it 'Save stock value' do
+      expect { repository_stock_value.save }.to change(RepositoryStockValue, :count).by(1)
+    end
+
+    it 'Updating stock value' do
+      repository_stock_value.save
+      expect { repository_stock_value.update_data!({amount: 10, low_stock_threshold:''}, user) }
+        .to change(RepositoryStockValue, :count).by(0)
+    end
+
+    it 'Updating stock value with ledger' do
+      repository_stock_value.save
+      expect { repository_stock_value.update_stock_with_ledger!(10, repository, "") }
+        .to (change(RepositoryLedgerRecord, :count).by(1))
+    end
+  end
+end