Just as Tesla reclaims $1 trillion market cap, worrying data out of China has investors asking questions

• Tesla's sales in China tumbled to just 3,070 vehicles last week, the worst performance since the start of Q2, driven by low volumes of the new Model Y. Despite the volatility in such high-frequency data, the market is crucial for Tesla. The brand can sell more cars in seven days there than in major European countries over the course of several months.

The gulf between Tesla’s $1 trillion market value and its underlying fundamentals like sales and earnings continued to widen...