For
new SGS bond, the coupon rate is set close to the cut-off yield (rounded to nearest 0.125%), and cut-off-price is close to 100.
However, for
re-open bond, you can't change the coupon rate. The 1.25% coupon was already set in 2021 during its first auction. See
https://www.mas.gov.sg/bonds-and-bi...?issue_code=N521100V&maturity_date=2026-11-01 - look at the auction history at the page bottom.
Today's interest rate is much higher (3%+) but this bond is only paying 1.25% coupon.
To compensate for this, the price will have to be lower than its original cut-off price in its first auction in 2021 (close to 100), ie. discounted.
Expanding on Izydata's example, if the cut-off price is determined to be $95 in this new auction, it will yield 3.43%.
This 3.43% is
guaranteed (if held to maturity), and realized in 2 ways:
- Regular coupons (1.25% pa)
- Discounted price of $95 against the original cut-off price (close to $100). This is similar to T-bill, which you buy at a discount.