---
symbol: "TSLA"
name: "Tesla"
date: 2026-09-21
change_pct: 3.389550719454148
direction: "up"
event_type: "m&a"
url: "https://perplo.app/why/TSLA/2026-09-21"
updated_at: 2026-09-21T15:06:35.285Z
---

# Why Tesla (TSLA) rose 3.39% on September 21, 2026

Tesla (TSLA) rose 3.39% on September 21, 2026 — Tesla-SpaceX merger speculation reshapes valuation.

## What happened

Dan Ives at Wedbush assigned an 80% probability to a Tesla-SpaceX merger, calling it a potential path to the world's largest company by market cap.

## Why it moved

A merger would combine Tesla's physical AI/autonomy roadmap with SpaceX's capital intensity, satellite infrastructure, and tech cachet — Ives argues this optionality justifies a re-rating of Tesla's multiple beyond EV…

## Why it matters

This ties into the Robotaxi, EV & Physical AI theme: a Tesla-SpaceX union would exponentially expand the addressable market and position Tesla as a multi-vector AI/infrastructure giant rather than a car company.

## What would break the thesis

The merger is speculative and structurally complex (cross-holding issues, regulatory scrutiny, SpaceX's private status); without formal board action, financing structure, or regulatory clarity, the thesis remains a…

## Sources

- [Dan Ives Puts Tesla-SpaceX Merger at 80% Odds: Will It Become the World's Biggest Company?](https://finnhub.io/api/news?id=1b46a4fc45cc2d6f8b88040b7d97ec429c5beeabcfc93fcca43e4e8af337d2d4) — Yahoo
- [Should You Pay Up For Tesla's Narrow Lead Over Its Peers?](https://finnhub.io/api/news?id=0941fde2394eaa34d5b04f486bcffd62e012cca4b0cc74796d673c16d8166ec5) — Yahoo
- [Sunrun and Tesla Dispatch 580 Megawatts To California’s Grid During Heat Wave, Marking Largest Residential Distributed Power Plant Event In History](https://finnhub.io/api/news?id=844b7fe6b71dcbdad0ba29b93de22696f4a5db9c3ec957f72ea27073a1e7885b) — Yahoo

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