HONG KONG, Oct 27 — Hong Kong stocks tumbled today with tech firms taking a heavy hit after US authorities banned China Telecom from the country over national security concerns, ramping up tensions between the two superpowers.

The Hang Seng Index lost 1.57 per cent, or 409.53 points, to 25,628.74.

The Shanghai Composite Index shed 0.98 per cent, or 35.33 points, to 3,562.31, while the Shenzhen Composite Index on China’s second exchange sank 1.11 per cent, or 26.88 points, to 2,397.51. — AFP