diff --git a/zipline/finance/trading.py b/zipline/finance/trading.py
index baa21e58..1d82bc66 100644
--- a/zipline/finance/trading.py
+++ b/zipline/finance/trading.py
@@ -155,7 +155,6 @@ class TransactionSimulator(object):
                 }
         return zp.ndict(txn)
 
-
 class TradingEnvironment(object):
 
     def __init__(