Bug fix in symbol loader

catalyst/exchange/exchange.py

@@ -138,13 +138,34 @@ class Exchange:
         symbol_map = self.fetch_symbol_map()
         for exchange_symbol in symbol_map:
             asset = symbol_map[exchange_symbol]
-            start_date = pd.to_datetime(asset['start_date']) \
-                if 'start_date' in asset else None
+
+            if 'start_date' in asset:
+                start_date = pd.to_datetime(asset['start_date'], utc=True)
+            else:
+                start_date = None
+
+            if 'end_date' in asset:
+                end_date = pd.to_datetime(asset['end_date'], utc=True)
+            else:
+                end_date = None
+
+            if 'leverage' in asset:
+                leverage = asset['leverage']
+            else:
+                leverage = 1.0
+
+            if 'asset_name' in asset:
+                asset_name = asset['asset_name']
+            else:
+                asset_name = None
 
             trading_pair = TradingPair(
                 symbol=asset['symbol'],
                 exchange=self.name,
                 start_date=start_date,
+                end_date=end_date,
+                leverage=leverage,
+                asset_name=asset_name
             )
 
             self.assets[exchange_symbol] = trading_pair