diff --git a/zipline/finance/performance.py b/zipline/finance/performance.py
index 34dfae89..d0dbb643 100644
--- a/zipline/finance/performance.py
+++ b/zipline/finance/performance.py
@@ -287,8 +287,6 @@ class PerformanceTracker(object):
         if self.results_socket:
             msg = zp.PERF_FRAME(self.to_dict())
             self.results_socket.send(msg)
-        else:
-            log.debug(self.to_dict())
 
         #
         if self.trading_environment.max_drawdown:
diff --git a/zipline/finance/trading.py b/zipline/finance/trading.py
index 2d378574..b2aacdc1 100644
--- a/zipline/finance/trading.py
+++ b/zipline/finance/trading.py
@@ -151,20 +151,6 @@ class TransactionSimulator(object):
                 dt.replace(tzinfo = pytz.utc),
                 direction
             )
-        elif len(orders) > 0:
-            warning = """
-Calculated a zero volume transaction on trade:
-{event}
-for orders:
-{orders}
-            """
-            warning = warning.format(
-                event=str(event),
-                orders=str(orders)
-            )
-            LOGGER.warn(warning)
-            return None
-
 
     def create_transaction(self, sid, amount, price, dt, direction):
         self.txn_count += 1