Chinese EV ADRs dropped on Wednesday. Nio fell 4.5%; XPeng, Li Auto fell around 2%. The European Union has decided to increase tariffs on Chinese-built electric vehicles to as much as 45.3% at the end of its highest profile investigation that has divided Europe and prompted retaliation from Beijing.

Just over a year after launching its anti-subsidy probe, the European Commission will set out extra tariffs ranging from 7.8% for Tesla Motors to 35.3% for China's SAIC, on top of the EU's standard 10% car import duty.

The extra tariffs were formally approved and published in the EU's Official Journal on Tuesday, meaning they will take effect on Wednesday.

The Commission, which oversees EU trade policy, has said tariffs are required to counter what it says are unfair subsidies including preferential financing and grants as well as land, batteries and raw materials at below market prices.

It says China's spare production capacity of 3 million EVs per year is twice the size of the EU market. Given 100% tariffs in the United States and Canada, the most obvious outlet for those EVs is Europe.

The China Chamber of Commerce to the EU said it was profoundly disappointed by the "protectionist" and "arbitrary" EU measure and was disheartened by the lack of substantial progress in negotiations to find an alternative to tariffs.

Beijing launched its own probes this year into imports of EU brandy, dairy and pork products in apparent retaliation.