特斯拉连涨四天，交付时间延长、需求增加

Core Insights - Tesla's stock price has risen for the fourth consecutive day, indicating a potential recovery of momentum lost recently [1] - The company launched an autonomous taxi service in Austin, Texas, in June, contributing to the positive stock performance [1] - The estimated delivery date for the Model Y has been extended from one to three weeks to four to six weeks, signaling increased orders and demand [1] Demand Factors - The increase in demand is partly attributed to the federal tax credit of up to $7,500 for vehicle purchases, which is set to expire due to the tax and spending bill passed on July 4 by Trump [1] - Some buyers may be rushing to purchase vehicles before the subsidy expires, potentially driving demand forward [1]