Electric car maker Tesla released a teaser video for its X platform, sparking speculation about an upcoming new car. The company's stock price rose over 5% on Monday following the news.

The first video, released on Sunday (October 5th), showed a rotating component, which many netizens believed could be the car's internal components. The number "10/7" appeared at the end of the video, corresponding to Tuesday (October 7th).

The second video, released on Sunday (October 5th), only showed the headlights of a car.

These teasers have sparked heated discussions online and among analysts, with speculation about Tesla's plans. Two main theories have emerged:

• The first theory is that this could be the next-generation Roadster sports car that Tesla CEO Elon Musk has been promising for years.
• The second theory suggests that Tesla may be about to release its much-anticipated mass-market (affordable) model.

Musk previewed the concept of the next-generation Roadster sports car at an event in November 2017 and in a series of tweets in June 2018.

Since then, the billionaire has repeatedly promoted the model, stating on the X platform in September of this year that "the new Roadster is more than just a car, it's something special."

However, Musk has a history of failing to deliver on promises or delivering the car much later than initially expected.

Meanwhile, Tesla has long said a more affordable mass-market model would be released this year. However, Musk has made it clear that this low-priced model is essentially a "Model Y-lite."

For investors, the mass-market model is seen as key to boosting Tesla's sales. Although Tesla reported an increase in vehicle deliveries in the third quarter of this year, the increase is believed to be driven by early demand due to the upcoming expiration of a federal tax credit. Prior to the third quarter, Tesla's deliveries had declined.

Tesla's sales in Europe continue to decline, and the company faces fierce competition from other automakers.

Foreign automakers have launched several low-priced models in Europe and other regions, further increasing pressure on Tesla to introduce models priced between $25,000 and $30,000.

After a dismal first quarter, during which the stock price fell 36%, Tesla's stock price has gradually recovered. In the third quarter, the stock price rose 40%, bringing its year-to-date gain to 12%.