SpaceX's Post-Lockup Rebound Echoes Xiaomi's Rally Two Weeks Earlier
Benedict Zhang compares Xiaomi's rebound from roughly HK$21 with SpaceX's post-lockup reversal—and explains how crowded shorts can turn an expected supply event into forced buying.
Most people saw the SpaceX lockup date and reached the same conclusion: more shares, more employee selling, lower price. It sounded reasonable. But when I looked at the setup, my first thought was Xiaomi.
A few weeks earlier, Xiaomi had been pushed down toward HK$21 while short activity remained heavy. Then something changed. The selling kept coming, but the price stopped responding. Once that happens, the problem slowly shifts from the longs to the shorts. Everyone who borrowed stock still has to buy it back eventually.
SpaceX felt like the same movie with a different cast. The whole market knew the unlock was coming. Traders had weeks to sell ahead of it, short it, and prepare for employees to dump their shares. By the time the date arrived, the bearish story was no longer a fresh insight. It was the most obvious trade on the screen.
I made a rare decision: I paused AmpliAlpha's strategy engine, cleared the conflicting exposure, and bought a sizable SPCX position directly. I was not betting that insiders would never sell. I was betting that the market had already priced in far more selling than would actually appear on day one. By the time of publication, the position was up roughly 10%, and I had started taking profits gradually.
Why Xiaomi came to mind
Xiaomi touched a 52-week low near HK$21.30 in late June and closed June 29 at HK$21.86. By late July, it had climbed back into the upper HK$20s. On several sessions during that recovery, short selling still represented roughly 30% or more of daily turnover.
The number that interested me was not HK$21 by itself. It was the stock's reaction around that level. Heavy short activity was no longer creating proportionate downside. The market was absorbing the pressure. That is often the moment when a trade that looks safest begins to become dangerous.
The part of a short trade most people do not see
A short position begins with borrowed stock. When the easy inventory has already been lent out, the next seller may face fewer shares, a higher borrow cost, or a broker that simply cannot locate the position. Existing shorts also become more exposed to recalls and tighter risk limits. A crowded short can therefore run out of room before the company runs out of bad news.
Public exchange data cannot show the live inventory inside every brokerage account, so I would not claim that every available Xiaomi share had been borrowed. What I could see was the combination that matters: persistent short activity, a price that refused to keep breaking, and fewer easy reasons for a new seller to enter at the bottom.
Why the SpaceX unlock did not scare me
More than 900 million SpaceX shares became eligible for sale on August 6. That was a huge headline number, but eligible to sell does not mean forced to sell. Employees do not all have the same cost basis, tax situation, liquidity needs, or view of the company. Treating the entire unlocked block as an immediate market order was too simple.
SPCX rose 6.1% on the unlock day and closed the following session at approximately $133.11. To me, that price action was the answer. The market had spent weeks fearing the event; once the event arrived and failed to crush the stock, short covering became more urgent than insider selling.
How I approached the trade
I was not trying to predict the exact number of shares employees would sell. I only needed the real selling to be less severe than the selling already implied by the price. When a catalyst is universally feared, “not as bad as expected” can be enough to move a stock quickly.
I also did not treat the rebound as unlimited. Once the position gained about 10%, I began reducing it in stages. A good entry does not remove the need for an exit. The first move may come from positioning and forced covering; the next move still has to be supported by the company, the valuation, and the broader market.
The comparison is useful, not perfect
Xiaomi and SpaceX are not comparable businesses, and I am not pretending they deserve the same valuation. What looked similar was the behavior of the people trading them: an obvious bearish story attracted a crowded position, then price stopped rewarding the crowd.
Xiaomi is an established Hong Kong listing with deep liquidity, recurring short-sale data, and corporate buybacks. SpaceX is newly public and still moving through a staged lockup schedule. More supply can arrive later. The Xiaomi analogy helped me recognize the first rebound; it does not guarantee the rest of the SpaceX chart.
What I am watching now
For Xiaomi, I want to see whether genuine buyers remain after the short-covering pressure fades. For SpaceX, I am watching the next unlock windows, insider disclosures, borrow conditions, volume, and whether the stock can hold the recovery without another mechanical squeeze.
This is the lesson I took from both trades: when everyone is waiting for the same obvious disaster, do not stop at the headline. Ask who has already sold, who still needs to buy back, and what happens if the disaster arrives but the price does not fall. Sometimes the most important signal is the move the market fails to make.
Data note
Xiaomi price and short-sale figures reference public HKEX-derived market data. SpaceX unlock and August 6 price information reference public reporting on the first lockup release; the August 7 close references current U.S. market data.
Public turnover data do not disclose every broker's live securities-lending inventory. Any assessment of constrained borrow is therefore presented as analysis, not as a verified market-wide inventory count.
About AmpliAlpha
AmpliAlpha, Inc. is a quantitative fintech firm focused on proprietary trading research, trading technology products, market analytics, backtesting infrastructure, paper-trading analytics, and applied quant education.
Media contact: [email protected]
Publication record
This article was originally published on August 9, 2026. Xiaomi (HKEX: 1810) had rebounded from a June 26 low near HK$21.30 into the upper HK$20s by late July. SpaceX (NASDAQ: SPCX) most recently closed at approximately $133.11 on August 7, 2026. The approximately 10% return discussed above reflects the founder's stated result on this individual trade and is not representative of future performance.