Group 1 - The recent billion-dollar stock purchase by Tesla is seen as a positive confidence signal, reminiscent of a similar event in February 2020, which led to significant stock performance gains afterward [1][2][3] - The confidence in Tesla's robo-taxi initiative is particularly strong, with expectations that it will outperform competitors like Whimo due to Tesla's lower cost base and scalable technology [3][4] - Tesla's operational scalability is demonstrated by the expansion of its service areas, increasing from 20 square miles to over 200 square miles in Austin and 400 square miles in San Francisco, indicating a positive trend in data collection and service capability [5][6] Group 2 - Elon Musk's personal investment in Tesla is interpreted as a sign that the company's performance is exceeding expectations, further boosting investor confidence [6]