Shares in Stellantis suffered a double-digit fall on Thursday as the US-European auto giant whose brands include Jeep, Fiat and Peugeot warned of financial bumps ahead.

The group — whose 14 brands also include Alfa Romeo, Maserati and Chrysler — reported a 13-percent rise in third-quarter sales as business improved in the United States, where it once struggled.

Sales reached 37.2 billion euros ($43.2 billion) in the three-month period as it reported growth in nearly every region except South America.

“As we continue to implement important strategic changes in order to provide our customers with greater freedom of choice, we have seen positive sequential progress and solid year-over-year performance in Q3, marked by the return of top-line growth,” said chief executive Antonio Filosa.

“T

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