First Financial Holding Co. (2892.TW) sold NT$80 million worth of structured notes linked to General Motors Corp. (GM) to retail customers, the financial services provider said Wednesday.

The notes are principal-protected, so the investors won't suffer any losses, said Annie Lee, an investor relations official at First Financial, in a conference call.

Lee also said First Financial's planned capital injection of NT$3 billion into its wholly owned First Commercial Bank Co., the island's fifth-largest bank by assets, reflects concerns that the unit won't report "robust" results this year.

First Commercial's first-quarter net profit totaled NT$1.62 billion, down 54% from NT$3.53 billion a year earlier, mainly because of a sharp drop in fee income, the parent company said in a statement Wednesday.

Lee said First Financial is also looking to buy a brokerage firm. She declined to elaborate.

-By Perris Lee Choon Siong, Dow Jones Newswires; +8862-2502-2557; perris.lee@dowjones.com