(Bloomberg/Craig Trudell) — Tesla Inc. managed to pique the interests of investors with a series of social media posts that sent the carmaker’s shares higher Monday.

First, the company posted a video clip of a black hubcap-like object with a Tesla logo spinning before flashing the numbers 10/7, likely referencing a product unveiling on Tuesday. A second post appears to show a car parked in pitch-black darkness, revealing only its headlights.

Tesla shares traded up as much as 4% shortly after the open in New York. The stock slumped late last week after the company posted a record quarter of car sales that will be difficult to replicate now that federal electric-vehicle subsidies have expired in the US.

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