SPCX Pushes Toward $200 as a 4% Float Leaves Nothing to Short

No Float, No Brakes

SpaceX completed the largest IPO in history on June 12, pricing at $135 and closing its first session near $161, up about 19% on record volume. The detail that matters more than the debut pop is the structure underneath it: only about 4% of shares trade publicly, with the rest locked behind insider holdings and a lockup that does not expire until December.

Into that sliver of float, the index machine switched on almost immediately. MSCI applied its early-inclusion rules and added SPCX on June 13, with accelerated Nasdaq 100 and FTSE Russell adds stacking on top. Passive funds tracking trillions became forced, price-insensitive buyers of a stock that has almost nothing to sell them. With no meaningful borrow to short against, every wave of demand pushes price instead of clearing supply — which is how SPCX gets from a $135 offer to a $199.70 print in three sessions.

The Perp Is Trading Rich to the Tape

For a perps desk the more interesting number is not the gain, it is the basis. The HIP-3 SPCX perp is printing $199.70 while the NASDAQ cash tape sat closer to $172–178 through June 15 — a double-digit premium that has persisted across this week's moves.

That gap is the float squeeze leaking into derivatives. When you cannot borrow the stock to short it, the only way to express either side of the trade is leverage, and Wall Street is already levering up SpaceX. With the book crowded long and no natural arbitrage seller able to source spot to close the gap, the perp floats above cash and funding does the work of keeping it there. The roughly $603M of 24-hour volume on this single HIP-3 market says the leverage bid is real, not a thin-book artifact.

What the Bid Is Ignoring

None of this is fundamentals. SpaceX posted a $4.9 billion net loss in 2025 and is being valued north of $2 trillion, a multiple that only works if you underwrite Starlink and xAI growing into it. Morningstar pegs fair value far below the tape and sees roughly 65% downside from here.

The bull case leans on Musk's claim of $1 trillion in annual revenue by 2030 and on the same scarcity that is driving the squeeze. The catch is that scarcity is temporary. The 83.3M-share underwriter overallotment is available for a 30-day window, and the real supply cliff is the December lockup expiry — the same setup that unwound float-driven rallies in Rivian and Uber. Float-driven moves run until the float arrives. On SPCX it eventually will.