diff --git a/tests/test_perf_tracking.py b/tests/test_perf_tracking.py
index e3ed169c..7f390c08 100644
--- a/tests/test_perf_tracking.py
+++ b/tests/test_perf_tracking.py
@@ -151,6 +151,17 @@ class TestSplitPerformance(unittest.TestCase):
                 zp_math.tolerant_equals(8020,
                                         daily_perf['ending_cash'], 1))
 
+            for i, result in enumerate(results):
+                for perf_kind in ('daily_perf', 'cumulative_perf'):
+                    perf_result = result[perf_kind]
+                    # prices aren't changing, so pnl and returns should be 0.0
+                    self.assertEqual(0.0, perf_result['pnl'],
+                                     "day %s %s pnl %s instead of 0.0" %
+                                     (i, perf_kind, perf_result['pnl']))
+                    self.assertEqual(0.0, perf_result['returns'],
+                                     "day %s %s returns %s instead of 0.0" %
+                                     (i, perf_kind, perf_result['returns']))
+
 
 class TestCommissionEvents(unittest.TestCase):
 
diff --git a/zipline/finance/performance/period.py b/zipline/finance/performance/period.py
index d154d475..a12a24d9 100644
--- a/zipline/finance/performance/period.py
+++ b/zipline/finance/performance/period.py
@@ -154,7 +154,11 @@ class PerformancePeriod(object):
         if split.sid in self.positions:
             # Make the position object handle the split. It returns the
             # leftover cash from a fractional share, if there is any.
-            leftover_cash = self.positions[split.sid].handle_split(split)
+            position = self.positions[split.sid]
+            leftover_cash = position.handle_split(split)
+            self._position_amounts[split.sid] = position.amount
+            self._position_last_sale_prices[split.sid] = \
+                position.last_sale_price
 
             if leftover_cash > 0:
                 self.handle_cash_payment(leftover_cash)