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-rw-r--r--python/analytics/portfolio.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/analytics/portfolio.py b/python/analytics/portfolio.py
index 43d9b5e7..ad09b09e 100644
--- a/python/analytics/portfolio.py
+++ b/python/analytics/portfolio.py
@@ -72,7 +72,7 @@ class Portfolio:
index.value_date = d
if len(self.indices) == 0:
for swaption in self.swaptions:
- self.swaption.value_date = d
+ swaption.index.value_date = d
self._value_date = d
def mark(self, source_list=[], option_type=None, model="black", surface_id=None):