Elon Musk opens Tesla's gigafactory outside Berlin, Germany.
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- Tesla might be about to make a huge windfall off its rivals failing to sell enough EVs.
- The US automaker is banding together with rivals like Ford and Toyota to help them meet tough new European emissions rules.
- UBS analysts estimated the move could net Tesla $1 billion in compensation.
Tesla might be about to make a huge windfall on electric cars its rivals aren't selling.