diff options
Diffstat (limited to 'python/analytics/tranche_basket.py')
| -rw-r--r-- | python/analytics/tranche_basket.py | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/python/analytics/tranche_basket.py b/python/analytics/tranche_basket.py index 9f3cc4fc..07af20a1 100644 --- a/python/analytics/tranche_basket.py +++ b/python/analytics/tranche_basket.py @@ -215,10 +215,10 @@ class DualCorrTranche: @maturity.setter def maturity(self, m): + # TODO: fix case of bespokes self._index.maturities = [m] - start_date = pd.Timestamp(self.value_date) + Day() self.cs = credit_schedule( - start_date, + self.value_date, 1.0, self._index.yc, m, @@ -289,13 +289,11 @@ class DualCorrTranche: def value_date(self, d: pd.Timestamp): self._index.value_date = d start_date = pd.Timestamp(d) + Day() - self.cs = credit_schedule( - start_date, - 1.0, - self._index.yc, - self.maturity, - rule=OldCDS if self.index_type == "BS" else CDS2015, - ) + if analytics._include_todays_cashflows: + self.cs = self.cs[self.cs.index >= start_date] + else: + self.cs = self.cs[self.cs.index > start_date] + self.cs.df = self.cs.payment_dates.apply(self._index.yc.discount_factor) self._accrued = ( (start_date - self.cs.start_dates[0]).days / 360 @@ -770,10 +768,13 @@ class DualCorrTranche: kbound = find_upper_bound(k, 4) moneyness_eq.append(brentq(aux, 0.0, kbound, (k, 4)) / el) self.rho = skew(moneyness_eq) - self.maturity += relativedelta(years=-1) + self._index.maturities = [self.maturity - relativedelta(years=1)] + cs = self.cs + self.cs = self.cs[:-4] r = self.pv - pv_orig self.rho = rho_orig - self.maturity += relativedelta(years=1) + self._index.maturities = [self.maturity + relativedelta(years=1)] + self.cs = cs return -r / self.notional + self.tranche_running * 1e-4 def expected_loss(self, discounted=True, shortened=0): |