SPCX Perp Runs 20% Over Cash as $30B of Index Buying Hits a 4% Float

What's Driving the Bid

SpaceX completed the largest IPO in history on June 12, 2026, pricing at $135 a share and raising roughly $75 billion at a ~$1.75 trillion valuation. The book was oversubscribed about 4x, so institutions that got cut out of the allocation have been buying in the open market. Shares closed the debut at $160.95, up roughly 19%, then pushed toward ~$178 on the second session. The honest read on this move is not "IPO momentum," though. It's mechanical: SPCX is being front-run into index inclusion, and the perp is the most liquid way to express that view.

The Float Math Is the Whole Story

Only 3% to 4% of SpaceX's shares are freely tradable at listing, with founder stock locked for 366 days. Against that sliver sits an enormous passive bid. Nasdaq rewrote its eligibility rules in May 2026 to admit top-40 names to the Nasdaq-100 after just 15 trading days, and FTSE Russell cut its window to five. Estimates of forced buying run from ~$8 billion for the Nasdaq-100 in month one to ~$30 billion across all index events. Nasdaq even applied a 3x weighting multiplier in place of a float adjustment, magnifying the demand. Within 15 trading days, passive funds are projected to hold roughly 30% of the float — on stock that is nearly impossible to borrow.

Why the Perp Trades Rich to Cash

At ~$212.90, the perp is running roughly 20% above the ~$178 cash stock. A basis that wide would normally invite arbitrage, but every leg of the trade is blocked. You can't reliably borrow the cash shares to short them, the lockup doesn't lift for about a year, and the natural valuation release valve — S&P 500 inclusion has been refused, with S&P reaffirming its profitability rule against SpaceX's projected $4.94 billion 2025 net loss. With no clean way to close it, the perp prices the supply-demand imbalance directly and there is little to drag it back to fair value.

What to Watch

The basis is the trade. It compresses if borrow opens up, if the float expands, or if S&P relents — none of which is imminent. It widens further as each scheduled index event lands its buying into the same thin float. Funding is the live tell: persistently positive funding means longs are paying to hold the premium, which is the running cost of being early to an inclusion squeeze. Post-IPO volatility cuts both ways, and the first genuine supply unlock — the 366-day lockup expiry — is still roughly a year out.