Sidus Space Inc. ( SIDU ) stock, after a brief surge after the market opened, is now down on Wednesday, possibly related to mounting speculation surrounding a massive SpaceX initial public offerings (IPOs) expected in June.

The Nasdaq is down 0.15% while the S&P 500 has gained 0.08%.

Because the Elon Musk-led rocket titan remains unavailable to most public-market investors until its pricing, traders often use smaller public space companies as liquid proxies for the broader theme.

• Sidus Space stock is among today’s weakest performers. Why is SIDU stock falling?

The Massive SpaceX IPO Momentum

The intense retail appetite follows recent regulatory progress for the industry giant. The sector-wide move comes less than a week after SpaceX publicly filed its S-1 for a planned Nasdaq listing under the ticker SPCX.

This landmark filing has revived market demand for space names, giving investors a detailed look at the private rocket and satellite giant’s financial metrics ahead of what Wall Street anticipates will be the largest IPO in history.

Broad Commercial Space Rally

The ongoing market action suggests retail traders view these developments as major catalysts for satellite and defense infrastructure, including companies such as Rocket Lab USA Inc. , Intuitive Machines Inc. ( LUNR ) and Momentus Inc. ( MNTS ) .

Critical Levels To Watch for SIDU Stock

The bigger story on the chart is trend strength: SIDU is trading well above its major moving averages, including about 73.8% above the 20-day SMA at $3.67 and about 197.3% above the 200-day SMA at $2.14. That kind of separation often attracts momentum traders, but it also raises the odds of sharp pullbacks if buyers pause.

RSI is the key momentum read right now, sitting at 72.47, which puts the stock in overbought territory.

Key Resistance: $6.64 — Near the 52-week high area, where supply often shows up after a strong run.

Key Support: $3.67 — Aligned with the 20-day SMA, a common first test level if momentum cools.

SIDU Stock Price Activity: Sidus Space ( SIDU ) shares were down 8.15% at $5.70 at the time of publication on Wednesday, according to Benzinga Pro data.