diff --git a/tests/test_perf_tracking.py b/tests/test_perf_tracking.py
index 1cfacfcd..ca526942 100644
--- a/tests/test_perf_tracking.py
+++ b/tests/test_perf_tracking.py
@@ -1069,3 +1069,9 @@ class TestPerformanceTracker(unittest.TestCase):
         messages += tracker.process_event(foo_event_3)
 
         self.assertEquals(2, len(messages))
+
+        self.assertEquals(1, len(messages[0]['intraday_perf']['transactions']),
+                          "The first message should contain one transaction.")
+        # Check that transactions aren't emitted for previous events.
+        self.assertEquals(0, len(messages[1]['intraday_perf']['transactions']),
+                          "The second message should have no transactions.")
diff --git a/zipline/finance/performance.py b/zipline/finance/performance.py
index 5bbac867..5d5ad5c4 100644
--- a/zipline/finance/performance.py
+++ b/zipline/finance/performance.py
@@ -245,7 +245,8 @@ class PerformanceTracker(object):
             # its own configuration down the line.
             # Naming as intraday to make clear that these results are
             # being updated per minute
-            _dict['intraday_perf'] = self.todays_performance.to_dict()
+            _dict['intraday_perf'] = self.todays_performance.to_dict(
+                self.saved_dt)
 
         return _dict
 
@@ -634,10 +635,13 @@ class PerformancePeriod(object):
 
         return rval
 
-    def to_dict(self):
+    def to_dict(self, dt=None):
         """
         Creates a dictionary representing the state of this performance
         period. See header comments for a detailed description.
+
+        Kwargs:
+            dt (datetime): If present, only return transactions for the dt.
         """
         rval = self.__core_dict()
 
@@ -647,7 +651,14 @@ class PerformancePeriod(object):
 
         # we want the key to be absent, not just empty
         if self.keep_transactions:
-            transactions = [x.__dict__ for x in self.processed_transactions]
+            if dt:
+                # Only include transactions for given dt
+                transactions = [x.__dict__
+                                for x in self.processed_transactions
+                                if x.dt == dt]
+            else:
+                transactions = [x.__dict__
+                                for x in self.processed_transactions]
             rval['transactions'] = transactions
 
         return rval