Alphabet and Meta are misclassed, they are information technology.

Tesla should (probably) be in industrials, as a car and battery tech company.

Amazon is hard to class, you might check if they break out to subsidiaries for AWS versus consumer retail. Part is definitely competing with Walmart.

At a glance, I think the author used S&P sector categorizations. They were set in 2018 and intentionally split the mega caps/FAANG/MAG7 across multiple sectors based on some hand waving about “primary” revenue source at that time.

From a finance perspective I think they’re a _little_ weird but functional (NVDA moves with semis, MSFT with software, etc) whereas from a tech perspective I’d say very weird until you learn about the backstory and what motivated it.

Tesla's market cap at this point is not based on building vehicles but technology/Automation/Hype.

If it were based on building vehicles there market cap would be 30x less than it was today comparing with Toyota.

Putting it in Information Technology is correct and the price is still stupid even then. It's why SpaceX is being forced to buy it, otherwise the whole deck of cards collapses.