Japanese global bank Sumitomo Mitsui Financial Group has sold $1bn worth of additional tier-1 bonds today (19 April).

In a regulatory filing on the Japan Exchange Group, SMFG said it had sold the bonds in two batches - ¥89bn five-year notes and ¥51bn ten-year bonds.

The coupon rate for the five-year note is 1.9% for the first five years and two months. Similar bonds issued by the bank in December had an initial coupon of 1.5%.

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The ten-year bond has a coupon of 2.2% for the first ten years and two months, compared with 1.7% for the ones sold in December.

SMFG has become the first global bank to issue AT1 bonds since Credit Suisse's sale to UBS last month.

The banking turbulence in Switzerland prompted Mitsubishi UHJ Financial Group, Japan's biggest bank, to delay the issuance of AT1 bonds, which was planned for this month, until at least mid-May.

In March, Swiss regulator FINMA approved the complete write-down of $17bn worth of AT1s to increase the Credit Suisse's core capital.

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FINMA's decision was softly criticised by both the European Central Bank and Bank of England who reiterated they would stick with the traditional loss-bearing hierarchy.