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-rw-r--r--python/risk/tranches.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/risk/tranches.py b/python/risk/tranches.py
index fee7b539..edd83f50 100644
--- a/python/risk/tranches.py
+++ b/python/risk/tranches.py
@@ -101,7 +101,7 @@ def insert_tranche_portfolio(portf, conn):
trade.delta,
trade.gamma,
theta,
- theta * trade.notional * trade.tranche_factor * trade._index._fx,
+ -theta * trade.notional * trade.tranche_factor * trade._index._fx,
trade.corr01,
trade.tranche_factor,
trade.upfront,