diff --git a/asset_backtester/backtester.py b/asset_backtester/backtester.py
index 7e58898..2ae6b29 100644
--- a/asset_backtester/backtester.py
+++ b/asset_backtester/backtester.py
@@ -114,7 +114,7 @@ class Backtest:
         money_total = total_value + self.current_cash
 
         row = pd.Series({
-            'total_value': total_value,
+            'total value': total_value,
             'cash': self.current_cash,
             'capital': money_total,
         }, name=date)
diff --git a/asset_backtester/examples/example.ipynb b/asset_backtester/examples/example.ipynb
index 0a0db42..09138dc 100644
--- a/asset_backtester/examples/example.ipynb
+++ b/asset_backtester/examples/example.ipynb
@@ -921,7 +921,7 @@
     }
    ],
    "source": [
-    "bt.run(initial_capital=1_000_000, periods=None)"
+    "bt.run(periods=None)"
    ]
   },
   {
@@ -1693,7 +1693,7 @@
    ],
    "source": [
     "# No rebalancing\n",
-    "bt.run(initial_capital=1_000_000, periods=None)"
+    "bt.run(periods=None)"
    ]
   },
   {
@@ -2013,7 +2013,7 @@
    ],
    "source": [
     "# Monthly rebalancing\n",
-    "bt.run(initial_capital=1_000_000, periods=1)"
+    "bt.run(periods=1)"
    ]
   },
   {
@@ -2257,7 +2257,7 @@
    ],
    "source": [
     "# Bi-annual rebalancing\n",
-    "bt.run(initial_capital=1_000_000, periods=6)"
+    "bt.run(periods=6)"
    ]
   },
   {