Hong Kong stocks extended their losses on Friday as Apple's steep price hikes highlighted mounting AI-related chip costs, adding to concerns over stretched technology valuations.

The Hang Seng Index fell 1.8%, or 405.05 points, to close at 22,671.86, while the Hang Seng China Enterprises Index dropped 1.9%, or 147.54 points, to finish at 7,460.84.

Apple raised prices for its iPad and MacBook lineup on Thursday, saying it could no longer absorb soaring costs of memory and storage chips driven by the AI industry's rapid data center expansion.

Sentiment was further dented after the New York Times report, citing three people familiar with the matter, that OpenAI is considering delaying its public listing until next year.

In corporate news, the Hong Kong bourse hosted its busiest trading debut session in months, with six companies making their market debut.

Lingyi iTech (Guangdong) (HKG:1688, SHE:002600) ended the session nearly 5% lower at HK$9.71, versus its offer price of HK$10.18.

Beijing Zhongke WengeAI Science and Technology (HKG:1956) closed 84% higher at HK$111.70, compared with its offer price of HK$60.70.

Keytop Parking (HKG:2272) ended the session 204% higher at HK$120.20, versus its offer price of HK$39.55

SG Micro (HKG:3661) closed 47% higher at HK$125.30, compared with its offer price of HK$85.20

PT Merdeka Gold Resources (HKG:6228) ended the session 7% lower at HK$24.86, versus its offer price of HK$26.60

Circuit Fabology Microelectronics Equipment (HKG:9630) closed 104% higher at HK$515.00, compared with its offer price of HK$252.73.