Cathie Wood serves as CEO and chief investment officer of Ark Investment Management. While Ark's portfolio boasts positions in many members of the "Magnificent Seven," one particular artificial intelligence (AI) darling seems to have caught Wood's eye as of late.

According to recently published trading activity, Ark Invest has been scooping up shares of Tesla (TSLA 2.28%) like there's no tomorrow.

Let's explore Wood's recent buying activity and assess what might have inspired her to double down on Tesla over the last few weeks.

Taking a look at Wood's recent buying activity

Unlike many of her peers in the wealth management space, Wood distributes summaries at the end of each trading session which itemize all of the stocks that Ark bought and sold on that day.

In the table below, I've summarized Ark's recent activity around Tesla stock.

Date Shares Bought
July 11 59,705
July 15 115,380
July 24 143,190

Data source: Ark Invest.

Over the last few weeks, Wood added 318,275 shares of Tesla which were spread across the Ark Innovation, Ark Next Generation Internet, and Ark Autonomous Technology & Robotics exchange-traded funds (ETFs).

Robotaxi button inside of a vehicle.

Image source: Getty Images.

Why might Wood like Tesla stock right now?

Tesla is primarily known for its electric vehicles and energy storage solutions. But over the last few years, CEO Elon Musk has been making grand promises that Tesla is going to disrupt the AI realm in epic fashion.

One of the ways Tesla plans to make a splash in the AI landscape is through its innovations in autonomous driving. The company is introducing self-driving vehicles to the Tesla ecosystem by offering the technology as a service -- primarily within Tesla vehicles purchased by consumers, as well as through the creation of a robotaxi fleet.

Wood has been bullish on Tesla's AI pursuits for years, especially the robotaxi business. In fact, Ark's long-run price target of $2,600 per Tesla share relies heavily on optimistic assumptions surrounding the company's ability to scale the robotaxi operation.

While Tesla's robotaxi business is still comparatively smaller than Alphabet's Waymo and faces increased competition from the likes of Uber Technologies and its various partnerships, Musk appears undeterred.

During Tesla's second-quarter earnings call, Musk proclaimed, "I think we will probably have autonomous ride-hailing in probably half the population of the U.S. by the end of the year."

Musk's statement is equal parts bold and speculative -- attributes that are congruent with Wood's growth investing strategy. At the end of the day, I don't think Wood is privy to anything meaningful that the rest of Wall Street isn't, though.

Investors like Wood tend to view Tesla through a long-run lens. In other words, some growth investors are not pricing Tesla for what the company is today, but rather they are assessing what the price could become if Musk pulls off his AI vision. While I understand how tempting it can be to follow hype and momentum, valuing narratives is essentially impossible.

I think that Wood is optimistic that the robotaxi business will scale meaningfully during the second half of 2025, finally bearing fruit for Tesla as the company shifts from a traditional automaker to a technology business.

Is Tesla stock a buy right now?

Valuing Tesla stock is an arduous exercise. On the one hand, the company does not fit neatly into the traditional automaker category alongside companies such as Ford Motor Company and General Motors. But on the other hand, Tesla is not purely a technology business much like Apple, Alphabet, Meta Platforms, Nvidia, or Amazon. Rather, Tesla sits at the intersection of car manufacturing, energy storage, AI, robotics, and software.

TSLA PE Ratio Chart

TSLA PE Ratio data by YCharts

In the chart above, investors can see how Tesla stock tends to trade on narratives well beyond traditional valuation fundamentals. These dynamics can be seen clearly by the company's expanding price-to-earnings (P/E) multiple despite decelerating profitability across the business.

While I'm optimistic about Tesla's robotaxi business in the long run, I do question Musk's aggressive timeline of serving half the U.S. population by year end. Beyond variables such as regulatory approvals needed across the country, Musk does have a reputation for missing deadlines. Candidly, I don't think the robotaxi rollout will be any different.

For now, I'd monitor Tesla as it scales the robotaxi business. It will take time before AI begins to move the needle for the company from a financial perspective, anyway. For these reasons, I think investors will have ample opportunity -- and probably more reasonable valuation levels -- to buy Tesla stock in the long run.