diff --git a/database/migrations/2021_01_30_112537_create_portfolio_users_table.php b/database/migrations/2021_01_30_112537_create_portfolio_users_table.php
index 065442a..dfb028c 100644
--- a/database/migrations/2021_01_30_112537_create_portfolio_users_table.php
+++ b/database/migrations/2021_01_30_112537_create_portfolio_users_table.php
@@ -16,8 +16,8 @@ return new class extends Migration
     public function up()
     {
         Schema::create('portfolio_user', function (Blueprint $table) {
-            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->onDelete('cascade');
-            $table->foreignIdFor(User::class, 'user_id')->onDelete('cascade');
+            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->constrained()->onDelete('cascade');
+            $table->foreignIdFor(User::class, 'user_id')->constrained()->onDelete('cascade');
             $table->boolean('owner')->default(false);
             $table->boolean('write')->default(false);
             $table->primary(['portfolio_id', 'user_id']);
diff --git a/database/migrations/2021_02_26_041257_create_market_data_table.php b/database/migrations/2021_02_25_041221_create_market_data_table.php
similarity index 85%
rename from database/migrations/2021_02_26_041257_create_market_data_table.php
rename to database/migrations/2021_02_25_041221_create_market_data_table.php
index f8345df..a6224f6 100644
--- a/database/migrations/2021_02_26_041257_create_market_data_table.php
+++ b/database/migrations/2021_02_25_041221_create_market_data_table.php
@@ -19,8 +19,8 @@ class CreateMarketDataTable extends Migration
             $table->float('market_value', 12, 4);
             $table->float('fifty_two_week_low', 12, 4);
             $table->float('fifty_two_week_high', 12, 4);
-            $table->timestamp('splits_synced_to_holdings_at')->nullable();
-            $table->timestamp('dividend_date')->nullable();
+            $table->timestamp('last_dividend_date')->nullable();
+            $table->float('last_dividend_amount', 12, 4);
             $table->timestamps();
         });
     }
diff --git a/database/migrations/2021_02_25_041227_create_daily_change_table.php b/database/migrations/2021_02_25_041227_create_daily_change_table.php
index 6e72094..65b9d86 100644
--- a/database/migrations/2021_02_25_041227_create_daily_change_table.php
+++ b/database/migrations/2021_02_25_041227_create_daily_change_table.php
@@ -16,7 +16,7 @@ class CreateDailyChangeTable extends Migration
     {
         Schema::create('daily_change', function (Blueprint $table) {
             $table->date('date');
-            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->onDelete('cascade');
+            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->constrained()->onDelete('cascade');
             $table->float('total_market_value', 12, 4)->nullable();
             $table->float('total_cost_basis', 12, 4)->nullable();
             $table->float('total_gain_loss', 12, 4)->nullable();
diff --git a/database/migrations/2021_02_25_041236_create_dividends_table.php b/database/migrations/2021_02_25_041236_create_dividends_table.php
index ff516a9..0b6cff0 100644
--- a/database/migrations/2021_02_25_041236_create_dividends_table.php
+++ b/database/migrations/2021_02_25_041236_create_dividends_table.php
@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\MarketData;
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
@@ -16,7 +17,7 @@ class CreateDividendsTable extends Migration
         Schema::create('dividends', function (Blueprint $table) {
             $table->uuid('id')->primary(); 
             $table->date('date');
-            $table->string('symbol', 15);
+            $table->foreignIdFor(MarketData::class, 'symbol');
             $table->float('dividend_amount', 12, 4);
             $table->timestamps();
         });
diff --git a/database/migrations/2021_02_25_041246_create_splits_table.php b/database/migrations/2021_02_25_041246_create_splits_table.php
index a3727cf..ffcf8b0 100644
--- a/database/migrations/2021_02_25_041246_create_splits_table.php
+++ b/database/migrations/2021_02_25_041246_create_splits_table.php
@@ -1,8 +1,9 @@
 <?php
 
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
+use App\Models\MarketData;
 use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
 
 class CreateSplitsTable extends Migration
 {
@@ -16,7 +17,7 @@ class CreateSplitsTable extends Migration
         Schema::create('splits', function (Blueprint $table) {
             $table->uuid('id')->primary(); 
             $table->date('date');
-            $table->string('symbol', 15);
+            $table->foreignIdFor(MarketData::class, 'symbol');
             $table->float('split_amount', 12, 4);
             $table->timestamps();
         });
diff --git a/database/migrations/2021_02_25_041257_create_transactions_table.php b/database/migrations/2021_02_25_041257_create_transactions_table.php
index a567825..7ed2184 100644
--- a/database/migrations/2021_02_25_041257_create_transactions_table.php
+++ b/database/migrations/2021_02_25_041257_create_transactions_table.php
@@ -1,6 +1,7 @@
 <?php
 
 use App\Models\Portfolio;
+use App\Models\MarketData;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Migrations\Migration;
@@ -16,8 +17,8 @@ class CreateTransactionsTable extends Migration
     {
         Schema::create('transactions', function (Blueprint $table) {
             $table->uuid('id')->primary(); 
-            $table->string('symbol', 15);
-            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->onDelete('cascade');
+            $table->foreignIdFor(MarketData::class, 'symbol');
+            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->constrained()->onDelete('cascade');
             $table->string('transaction_type', 15);
             $table->float('quantity', 12, 4);
             $table->float('cost_basis', 12, 4);
diff --git a/database/migrations/2021_09_06_014744_create_holdings_table.php b/database/migrations/2021_09_06_014744_create_holdings_table.php
index a5f4b09..17f24e0 100644
--- a/database/migrations/2021_09_06_014744_create_holdings_table.php
+++ b/database/migrations/2021_09_06_014744_create_holdings_table.php
@@ -1,6 +1,7 @@
 <?php
 
 use App\Models\Portfolio;
+use App\Models\MarketData;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Database\Migrations\Migration;
@@ -16,13 +17,15 @@ class CreateHoldingsTable extends Migration
     {
         Schema::create('holdings', function (Blueprint $table) {
             $table->uuid('id')->primary(); 
-            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->onDelete('cascade');
-            $table->string('symbol', 15);
+            $table->foreignIdFor(Portfolio::class, 'portfolio_id')->constrained()->onDelete('cascade');
+            $table->foreignIdFor(MarketData::class, 'symbol');
             $table->float('quantity', 12, 4);
             $table->float('average_cost_basis', 12, 4);
             $table->float('total_cost_basis', 12, 4)->nullable();
             $table->float('realized_gain_loss_dollars', 12, 4)->nullable();
             $table->float('dividends_earned', 12, 4)->nullable();
+            $table->timestamp('splits_synced_at')->nullable();
+            $table->timestamp('dividends_synced_at')->nullable();
             $table->timestamps();
         });
     }