Hong Kong stocks dropped more than one percent on Thursday -- giving up the previous day's rally -- on lingering concerns about the global economy, with tech firms leading the losses.

The Hang Seng Index sank 1.5 percent, or 315 points, to close at 20,574.

The Shanghai Composite Index fell 1 percent, or 32 points, to 3,272, while the Shenzhen Composite Index shed 0.8 percent, or 16 points, to 2,193. (AFP)