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-rw-r--r--pyisda/curve.pyx3
1 files changed, 2 insertions, 1 deletions
diff --git a/pyisda/curve.pyx b/pyisda/curve.pyx
index 57ef1f0..6819def 100644
--- a/pyisda/curve.pyx
+++ b/pyisda/curve.pyx
@@ -447,7 +447,8 @@ cdef class SpreadCurve(Curve):
raise ValueError("Didn't init the survival curve properly")
else:
self._thisptr = make_shared(curve)
- self.ticker = ticker.encode()
+ if ticker:
+ self.ticker = ticker.encode()
survival_probability = Curve.__forward_zero_price