The SpaceX (SPCX) stock rebounded slightly on Tuesday, after dipping below its market offering price in early trade.

SpaceX stock was down 3% to around $149 before recovering, a notable move given the stock debuted on June 12 at $150. It's a psychologically important level and indicative that SpaceX is following other major market debuts that eventually traded below their offer price.

Shares rebounded and were up around 6% in midday trading, but only closed up less than 1%.

Market makers and SpaceX's biggest investors, like institutional funds, will likely be under pressure to defend the stock following these big drops. In addition, SpaceX shares are approaching their IPO price of $135, another level to watch.

At $150, SpaceX stock is up only 11% from its IPO price of $135. At current levels, SpaceX has lost around $400 billion in market cap and is threatening to dip below the $2 trillion market cap level.

It was only last week, during its big run-up to an all-time high of around $225 a share, that SpaceX topped Amazon (AMZN) and even Microsoft (MSFT) to become the fourth-most-valuable public company.

SpaceX's stumble following the initial surge after its market debut is also sinking space sector stocks.

Bespoke noted that these space stocks were up 99% year to date at the close on Thursday, June 11. · Bespoke Investment Group

Bespoke Investment Group noted that, on average, these stocks were up 99% year to date at the close on Thursday, June 11, when SpaceX (SPCX) priced its shares at $135. Since that day, the same basket of space stocks is down an average of 17%.

In addition, the looming end of lock-up periods is weighing on the stock. SpaceX initially offered up only 4.2% of its float.

22V Research strategist Jeff Jacobson told Yahoo Finance that there is a 20% insider share unlock after SpaceX's earnings announcement in early to mid-August.

In addition, there is a 10% share unlock if the stock trades 30% above the IPO price, as well as 7% share unlocks set for around Aug. 21 and then again on Sept. 10.

Pras Subramanian is Lead Transportation Reporter for Yahoo Finance. You can follow him on X and on Instagram.

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