Hang Seng Index swings after 3.3 per cent plunge in Nasdaq 100 on concerns about frothy tech valuations.

Hang Seng Index swings after 3.3 per cent plunge in Nasdaq 100 on concerns about frothy tech valuations.

Hang Seng Index up 0.6% after 3.3% plunge in Nasdaq 100 on concerns about frothy tech valuations.