Will Tesla and SpaceX Officially Announce a Merger by 31 December 2026?

This market is very young and thinly traded, and that shapes how much weight to put on any single price. It was first recorded on 29 July 2026 at 82%, moved as high as 98%, and has since fallen to a consensus of 17% — a collapse of well over 60 percentage points from its opening levels within roughly a day of trading. The reported 24-hour change is a gain of 15.7 percentage points, which means the 17% level itself represents a partial recovery from an even lower point reached after the initial spike unwound. With only 41 price observations recorded and $87,398 in total volume on a single venue, Polymarket, this is a market still finding its footing rather than one reflecting a settled consensus. The swing from near-90% down to under 20% is more consistent with an initial speculative reaction — traders pricing in the mere possibility that Musk's history of merging companies (as with xAI and X in 2025) could repeat here — followed by a sharper reassessment once the structural obstacles became clearer. Those obstacles are substantial: SpaceX is private and was valued near $350 billion in tender offers completed in 2024, so any share-based combination with publicly traded Tesla would require a complex valuation exercise, dilution calculations, and disclosure that take months, not weeks, to construct. Tesla's own board would need an independent special committee to review the deal given Musk's position on both sides — the exact structure that drew a fiduciary-duty finding against Musk in the SolarCity case a decade earlier. No public filing, board statement, or Musk announcement proposing merger terms had been reported at the time this market opened, which is itself informative: markets pricing corporate events usually move on a specific trigger — a leaked term sheet, a regulatory filing, an earnings-call remark — and the absence of one suggests the early 82-98% range reflected speculation rather than confirmed reporting. The subsequent fall to 17% looks like the market correcting toward that reality, while the small rebound in the last 24 hours suggests some traders still see a non-trivial chance that Musk moves faster than the legal process typically allows.