Short answer

You can interpret SDL, T-bill, and G-secs symbols by understanding their unique combination of numbers and alphabets that provide key information about each security.

State Development Loans (SDL)

Example: 709UP30-SG

709: 7.09% annualised interest rate

UP: Uttar Pradesh (issuing state)

30: 2030 (year of maturity)

SG: State government

Treasury Bills (T-bill)

Example: 364D221222-TB

364D: Tenure of 364 days

221222: 22nd December 2022 (maturity date)

TB: Treasury bill

Government Securities (G-sec)

Example: 522GS2025-GS

522: 5.22% annualised interest rate

GS: Government security

2025: Year of maturity

GS: Government security

You can learn more by visiting Government securities module on Arrow learning resources.