SpaceX's initial public offering has attracted demand for more than four times the available shares, according to people familiar with the matter, as reported by Bloomberg. The strong subscription rate signals intense investor appetite for one of the most anticipated market debuts.

However, CNBC's Jim Cramer flagged a significant risk: speculators who may rush to sell shares shortly after trading begins. He described this group as one of the biggest threats to the IPO's near-term stability, suggesting that early volatility could overshadow the company's long-term prospects.

Bloomberg's Michael Hytha broke down the latest developments, noting the oversubscription reflects institutional and retail enthusiasm for the aerospace company. No specific valuation or share price details were disclosed in either report.

If a wave of early sellers materializes, it could depress the stock price in its first weeks of trading, frustrating long-term holders. The dynamic echoes patterns seen in other high-profile IPOs where initial pops gave way to sharp pullbacks.

Cramer's caution serves as a counterweight to the bullish demand figures. Investors will be watching the first few sessions closely to gauge whether speculative trading or steady buying dominates. Speculation could cause short-term price swings that may not reflect SpaceX's fundamental value. The narrative is based only on two primary sources—oversubscription data from Bloomberg and a single warning from Cramer—lacking third-party confirmation or internal SpaceX commentary.