Shares in Alibaba soared more than 14 percent on Friday, extending a blistering rally in Hong Kong's Hang Seng Index, after forecast-topping earnings added to a growing sense of optimism over Chinese tech firms.

The e-commerce titan announced on Thursday that sales rose eight percent to 280 billion yuan in the three months through December, exceeding the 277 billion yuan estimated by a Bloomberg pool of analysts.

The news sent its share prices rocketing 14.6 percent in Hong Kong, building on a rally that has seen it bounce nearly 70 percent higher since the turn of the year, and is now at a three-year high.

The Hang Seng Index finished up 3.99 percent, or 900.94 points, to 23,477.92.

The Hang Seng tech index surged more than six percent, with other household names making big moves higher. (AFP)