Calculate the Strip Roll for SP bonds which traders can utilize for analyze 20-year and 30-year WI bonds
Leverage the default view under “Table” – “System View” and select “default” with new columns added: STRIP WI SP Roll, STRIP WI SP Yld, and STRIP BM SP Yld.
STRIP WI SP Yld: the equivalent SP yield for B/E SP_PX of WI Bond
STRIP BM SP Yld: the equivalent SP yield for B/E SP_PX of BM bond
STRIP WI SP Roll: STRIP WI SP YLD - STRIP BM SP YLD
In RiskVal, traders can estimate the SP WI Roll using two methods:
Method #1: SP WI Roll = Carry + Curve Liquidity
Method #2: Use SP B/E calculation to imply WI SP vs SP roll. If you choose this method, then the whole bond WI roll value will equal the “STRIP WI Roll”
![](https://static.wixstatic.com/media/f9d22c_e7334d498f3c49dfa8ed1678b85b70f6~mv2.png/v1/fill/w_49,h_10,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/f9d22c_e7334d498f3c49dfa8ed1678b85b70f6~mv2.png)
Of note: two columns have been renamed B/E SP Roll to Strip WI Roll and B/E SP Yld to Strip WI Yld.