Tesla shares jumped after the company released a long-awaited update to its Full Self-Driving software, reinforcing a pattern where TSLA’s price movements are increasingly tethered not to how many cars it sells, but to how well those cars can drive themselves.

The rally underscores a broader truth about Tesla’s valuation: analysts estimate that roughly 77% of the company’s market cap is tied to the successful deployment of its autonomy technologies.

FSD updates keep moving the needle

Tesla’s approach to self-driving has always been software-first. Rather than waiting for a finished product, the company pushes incremental improvements to its fleet through over-the-air updates.

Version 13 of FSD began rolling out to customers in December 2024, marking a significant milestone in the software’s evolution. That release helped fuel a wave of investor optimism that carried into early 2025.

Then in April 2025, TSLA surged 9.8% following regulatory updates from the US Department of Transportation.

More recently, a Spring 2026 update introduced AI-powered features designed to further enhance the software’s capabilities.

The hardware problem nobody wants to talk about

In April 2026, Tesla acknowledged that millions of vehicles equipped with Hardware 3 will need physical hardware upgrades to fully utilize unsupervised FSD capabilities.

Software updates scale instantly across the entire fleet. Hardware upgrades require service appointments, physical components, and either Tesla eating the cost or customers paying for it. The company hasn’t detailed the cost structure for these upgrades or how quickly they can be completed.

The 77% valuation figure tied to autonomy assumes Tesla can scale FSD across its entire fleet. If a significant chunk of that fleet needs expensive retrofits first, the timeline and the margins both get messier.

The robotaxi angle

Tesla’s ambitions extend well beyond selling FSD as a feature to individual car owners. The company has been laying groundwork for a robotaxi service, where autonomous Teslas would operate as a ride-hailing fleet, generating recurring revenue without selling additional vehicles.

But the competitive landscape is getting crowded. Waymo, backed by Alphabet, already operates commercial robotaxi services in multiple US cities. Cruise, despite setbacks, remains in the race. Chinese competitors like Baidu’s Apollo are advancing rapidly in their home market.

What this means for investors

The bull case is straightforward. If Tesla delivers on FSD and launches a robotaxi network, the revenue potential dwarfs anything it makes from selling cars.

The bear case is equally clear. That 77% valuation dependence on autonomy tech means if FSD hits sustained regulatory or technical roadblocks, the stock is dramatically overvalued relative to its actual car-selling business. The Hardware 3 upgrade issue is a concrete example of the kind of friction that can slow deployment and erode margins.

There’s also the Dogecoin wrinkle. Tesla continues to accept DOGE for vehicle purchases, a nod to CEO Elon Musk’s well-documented enthusiasm for the meme coin.

For anyone holding or considering TSLA, the key metrics to track are FSD intervention rates, which measure how often a human needs to take over from the software, regulatory approvals for unsupervised operation in new jurisdictions, and any concrete timeline or pricing for the Hardware 3 upgrade program.