Guotai Junan International Holdings Ltd shares are headed for their best week on record after the broker obtained regulatory approval to offer trading services of cryptocurrencies in the Hong Kong Special Administrative Region.

The stock extended gains to a fourth day, bringing this week’s advance to nearly 300 percent. Shares jumped after the Hong Kong Securities and Futures Commission approved the company’s license upgrade that would enable its clients to directly trade virtual assets, including Bitcoin, Ether and stablecoins, on its platform.

Hong Kong on Thursday released its second policy statement on the development of digital assets to establish a framework for service providers. 

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The approval for Guotai has raised expectations for other Chinese mainland brokers with international units to obtain similar permits. Huatai International Financial Holdings Co, China Merchants Securities International Co, and several other brokerages are in the process of applying for their license upgrade to gain access to virtual asset trading, Securities Times reported Thursday.

Improved sentiment has also boosted other stocks in the sector. Mainland-listed Guosheng Financial Holding Inc gained by the 10 percent daily limit for a third day, while Tianfeng Securities Co climbed as much as 8 percent.