[英]Error dealing with CMS Pricer in QuantLib
我試圖在 QuantLib 中為 CmsRateBond 定價。 這是我運行print(ql.as_coupon(bond.cashflows()[-2]).rate())
時發生的錯誤
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
c:\Users\...\question.py in
----> 74 print(ql.as_coupon(bond.cashflows()[-2]).rate())
~\Anaconda3\lib\site-packages\QuantLib\QuantLib.py in rate(self)
9694
9695 def rate(self):
-> 9696 return _QuantLib.Coupon_rate(self)
9697
9698 def accrualPeriod(self):
RuntimeError: pricer not set
如果我沒記錯的話,我可以通過包含定價器 (ql.CmsCouponPricer?) 來解決問題。 不幸的是,我在 web / python 食譜中沒有發現任何有關 CMS 債券的有用信息。 我在下面復制我的代碼(向量 spot_rates,轉發是從 csv 文件導入的):
import QuantLib as ql
issue_date = ql.Date(4, 4, 2013)
maturity_date = ql.Date(4, 4, 2025)
float_coupon_daycount = ql.Actual360()
float_coupon_period = ql.Period("1Y")
quotedMargin = 0.0195
faceAmount = 100.0
last_floating_rate = -0.000149
settlement_days = 2
# valuation date
calc_date = ql.Date(14, 12, 2020)
ql.Settings.instance().evaluationDate = calc_date
# Discounting curve
discounting_curve = ql.ZeroCurve(
spot_dates,
spot_rates,
ql.ActualActual(),
)
discounting_curve_handle = ql.YieldTermStructureHandle(discounting_curve)
# Forecasting curve
forecasting_curve = ql.ForwardCurve(dates, forwards, float_coupon_daycount)
# Index
index = ql.EuriborSwapIsdaFixA(
ql.Period("10Y"), ql.YieldTermStructureHandle(forecasting_curve)
)
#Schedule
schedule = ql.Schedule(
issue_date,
maturity_date,
ql.Period("1Y"),
index.fixingCalendar(),
ql.ModifiedFollowing,
ql.ModifiedFollowing,
ql.DateGeneration.Backward,
False,
)
# CMS bond
bond = ql.CmsRateBond(
settlement_days,
faceAmount,
schedule,
index,
index.dayCounter(),
ql.Unadjusted,
fixingDays=index.fixingDays(),
gearings=[1],
spreads=[quotedMargin],
caps=[],
floors=[0],
)
# add last fixing rate
fixingDates = [
cf.fixingDate() for cf in map(ql.as_floating_rate_coupon, bond.cashflows()[:-1])
]
missing_fixingDate = list(filter(lambda x: x < calc_date, fixingDates))[-1]
index.addFixing(missing_fixingDate, last_floating_rate)
print(ql.as_coupon(bond.cashflows()[-2]).rate()) # RuntimeError: pricer not set
我正在使用通過 pip 安裝的 QuantLib 1.19。
我想驗證優惠券。 您能幫我並提供測試我的代碼所需的代碼嗎? 謝謝你。
首先,您必須設置一個 cms 定價器。 您可以查看 SWIG 測試( https://github.com/lballabio/QuantLib-SWIG/blob/master/Python/test/cms.py )
這是一個簡單的例子:
volQuote = ql.QuoteHandle(ql.SimpleQuote(0.2))
swaptionVol = ql.ConstantSwaptionVolatility(0, ql.TARGET(), ql.ModifiedFollowing, volQuote, ql.Actual365Fixed())
swvol_handle = ql.SwaptionVolatilityStructureHandle(swaptionVol)
mean_reversion = ql.QuoteHandle(ql.SimpleQuote(0.01))
cms_pricer = ql.LinearTsrPricer(swvol_handle, mean_reversion)
然后您可以將該定價器分配給債券息票:
ql.setCouponPricer(bond.cashflows(), cms_pricer)
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