Hong Kong and mainland stocks fell on Tuesday, with automobile shares weighed down by tariff threats and peer competition worries.

The benchmark Hang Seng Index closed 227 points lower, or 1.06 percent, to 21,294. The main board turnover dropped to HK$219.61 billion, compared to the previous day, but remained above HK$200 billion for the third consecutive day.

The Tech Index retreated by 2.73 percent, closing at 5,142.

Shares in Chinese automakers were weighed down by potential US tariffs and competition concerns following BYD’s (1211) move to offer free smart driving features.