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Calibration of Hull White One factor model in F.C.Park paper

I want to ask a question with reference to a paper from below link http://www.cmpr.co.kr/asset/research_material/implementing_interest_rate_models.pdf Minimization specified in Page 14: Mean ...
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Reasoning for Bloomberg's short rate volatilty calculation

Bloomberg, in its documentation, explains that it calculates the short rate volatility for its Hull White implementation by multiplying the e.g. 10y IRS rate (divided by 100) by the 10y cap vol. Why? ...
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Self-financing strategy in the Hull-White bond model

I am having troubles with solving a particular problem concerning the self-financing portfolio in the Hull-White model (dr={phi(t)-ar}dt+sigmadW). Consider an expiry-T_0, Strike-K cll-option on a ...