What happened

Tesla (TSLA -1.92%) is already dealing with COVID-19-related issues at its most productive facility in Shanghai, China. But other factors are weighing on the stock today, too. That has led to a decline in the shares this morning, with the stock reaching its lowest level in 18 months. As of 11:43 a.m. ET Monday, Tesla shares were down 5%. 

So what

Tesla's China plant recently was upgraded for the ability to produce an annual capacity of about 1.1 million vehicles. But last week, Barron's reported that the facility shipped 71,704 electric vehicles in October, down from the record 83,135 delivered the previous month. China's strict COVID-19 policies, which have resulted in lockdowns throughout the region, have negatively affected productivity.

That has also impacted consumer demand in China, and it might be partly why Tesla recently lowered prices for Chinese customers. But another factor could be weighing on Tesla shares today, too, and it doesn't have to do with the business itself.

A red Tesla Model S.

Image source: Tesla.

Now what

Now that Tesla CEO Elon Musk has taken Twitter private, the entrepreneur has one more major item on his plate. But that might not be the biggest concern for Tesla investors. Musk used some debt to buy Twitter, and interest payments will need to come from either the business's cash flow or some other source. Several companies have announced a suspension in advertising on Twitter until the new direction of the social media site is more clear. That could mean lower cash flow, and Musk might need to service the debt interest payments from his own funds. 

The problem for Tesla shareholders is that Musk might have to sell more Tesla stock if he needs to raise short-term cash. That could be what is now impacting Tesla stock, or it could be other shareholders trying to game that potential.

For long-term investors, however, that shouldn't be a concern. In fact, for those wanting to hold Tesla stock for years, this could be a good chance to start a position at a better price.