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-rw-r--r--pyisda/curve.pyx2
1 files changed, 1 insertions, 1 deletions
diff --git a/pyisda/curve.pyx b/pyisda/curve.pyx
index 94deda1..c10ad48 100644
--- a/pyisda/curve.pyx
+++ b/pyisda/curve.pyx
@@ -721,7 +721,7 @@ cdef void tweak_curve(const TCurve* sc, TCurve* sc_tweaked, double epsilon,
else:
for i in range(sc.fNumItems):
h2 = sc.fArray[i].fRate
- t2 = (sc.fArray[i].fDate - sc.fBaseDate) / 365.
+ t2 = sc.fArray[i].fDate - sc.fBaseDate
c += (h2 * t2 - h1 * t1) * (1 + epsilon * ((mask >> i) & 1))
sc_tweaked.fArray[i].fRate = c / t2
h1 = h2