Announced by CFHC on behalf of CTBC for the substitute reference rate of 2021 3rd Senior Unsecured USD 5Y Callable CMS Spread IR Linked Financial Debentures

1.Date of occurrence of the event: 2023/05/26
2.Company name: CTBC Bank Co., Ltd.
3.Relationship to the Company (please enter ”head office” or
  ”subsidiaries”): subsidiaries
4.Reciprocal shareholding ratios:100% held by CTBC Financial Holding Co., Ltd.
5.Cause of occurrence: Following June 30, 2023, the administrator of the
underlying of the 3rd Senior Unsecured USD 5 Year Callable CMS Spread
Interest Rate Linked Financial Debentures in 2021 (“Debentures”) will cease
the publication of the underlying (i.e. 30Y USD CMS and/or 5Y USD CMS).
6.Countermeasures: Starting from August 30, 2023, the reference rate for the
coupon rate of the Debentures will be replaced by 30Y USD ISR Fallback Rate
minus 5Y USD ISR Fallback Rate. The underlying will be replaced by 30Y USD
SOFR ICE Swap Rate and/or 5Y USD SOFR ICE Swap Rate. The coupon rates,
starting from the 9th Calculation Period to the 20th Calculation Period as
specified in Schedule 1 of the terms of issuance of the Debentures, will be
calculated in accordance with the substitute reference rate.
7.Any other matters that need to be specified (the information disclosure
  also meets the requirements of Article 7, subparagraph 9 of the Securities
  and Exchange Act Enforcement Rules, which brings forth a significant impact
  on shareholders rights or the price of the securities on public companies.):
NA