HomeDefinitionsCompareDebt Irrational call optionThe financial definition for Irrational call option:The implied call imbedded in a MBS. Irrational because the call is sometimes not exercised when it is in the money (interest rates are below the threshold to refinance), and sometimes exercised when it is not in the money. Option exercise like this affects payments on the MBS. Click to compare definitions of Irrational call option Click to view definitions beginning ir |