There was good and not so good news for Tesla investors over the weekend.

First, the good. Tesla CEO Elon Musk took to X to discuss Tesla earnings. Musk believes Tesla's profit can rise 1,000% in the coming five years, adding "It will require outstanding execution."

Musk's comment was made in response to a tweet that pointed out Wall Street projections have Tesla earnings roughly $9 a share in 2029 from less than $2.90 in 2023, up about 300%.

It isn't guidance; it's a goal. Investors will have to wait until Monday to see if the comment moves Tesla stock. For now, they can consider what it means for Tesla's share price.

"A 10x increase in Tesla earnings translates" into a $714 stock price today, says Future Fund Active ETF co-founder and Tesla shareholder Gary Black, adding about the earnings growth "that's Elon's assumption not ours."

Black's math is relatively straightforward. The 10x increase means earnings between $24 and $25 a share in 2025. The stock might trade for about 50 times earnings, putting the 2029 price at about $1,200. Discounting back at about 14% gets Black to his $714 figure.

If nothing else, it explains why Tesla investors are currently willing to pay about 100 times estimated 2025 earnings for shares.

As for what will drive earnings up 1,000%, Musk believes self-driving technology will do it. Tesla plans to launch a self-driving robotaxi service in 2025.

Self-driving features are also the source of not-so-good news. Tesla recently released higher-level self-driving features in China and charges Chinese buyers more than $8,000 for the features.

One early review is disappointing. Tesla's new features were "met with not-so-exciting feedback initially with (1) much higher needs on manual takeovers; (2) more traffic violation cases," wrote Citi analyst Jeff Chung in a recent report.

Tesla uses AI computers to train its systems to drive. Training in China has been a challenge for the company. "We do have some challenges [in China] because they [won't] allow us to transfer training video outside of China. And then the U.S. government won't let us do training in China, " said Musk on his company's fourth quarter earnings conference call in January.

"Tesla has reportedly sent engineers from the U.S. to China in early Feb. for local deployment of [driver assistance] and optimization of its algorithms," added Chung. He expects Tesla's features to improve over time.

They better or else Tesla will have a tough time selling the system for more than $8,000. Chinese EV leader BYD doesn't charge anything extra for its driver assistance products.

The best news for Tesla investors might be that both of these tidbits are about Tesla's business and stock market fundamentals instead of Musk's political activities, which investors have recently worried are hurting sales.

Tesla's January sales fell in the U.S., Europe, and China compared with a year ago.

Falling sales weighed on investor sentiment in February. Shares dropped 28% for the month, leaving them down about 27% year to date. The S&P 500 was up about 1%.