Hi, I have calculated the yield basis the code you have given (yield: (sgb.issuePrice * sgb.interestPayable) / sgb.askPrice), however the result is coming different to what being shown at calculator website. SGBJUL28IV: [Issue Price (4852) * Interest Payable (2.5%)]/Ask Price (4838) = 2.51% compared with 2.74% yield on calculator website. Can you please help on this ?