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Re: PeiceWise and FuturesRateHelper

Posted by DHar on Sep 20, 2010; 6:57am
URL: http://quantlib.414.s1.nabble.com/PeiceWise-and-FuturesRateHelper-tp1464p1465.html

Hi All,

Would anyone have any suggestions for this?

Regards
DHar wrote
Using PeicewiseYieldCurve, I'm trying to construct a 3 month USD  
discount curve from the first 8 eurusd contracts. This curve is being  
built from the 8 Futures Objects I have built using the  
FuturesRateHelper2.

The problem is if I adjust the Convexity within the FuturesRateHelper2  
from 0.00 (as per the sample spreadsheet "YieldCurveBootstrapping"),  
the PiecewiseYieldCurveDates and PiecewiseYieldCurveData from the  
PiecewiseYieldCurve changes to NUM!....... Im inserting the convexity  
as the Implied Volatility for each contract.

Also a point to note, is that the PiecewiseYieldCurveDates returns the  
wrong Future settlement dates.... The first two Sep10 and Dec10 are  
correct as the 3rd Wednesday,however March and June show Tuesday and  
Thursday respectively. QuantLib XL returns the correct dates when I  
use QLIMMDate on the same IMM code, so why does the  
PiecewiseYieldCurveDates return the wrong array of dates from the  
constructed YieldCurve thats built from the FutureRatesHelper Objects?

Cheers

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