The S&P Dow Jones Indices is keeping rules in place that prevent SpaceX from quickly joining the S&P 500 after its IPO.

And while the Nasdaq and Russell indexes have approved those changes, S&P Dow Jones Indices, which operates the S&P 500 and related indexes, announced on June 4 that it would not implement them. “No changes will be made to the eligibility criteria,

SpaceX will sell its shares for $135 apiece during its IPO, yielding a valuation of $1.77 trillion.

By Echo Wang and Milana Vinn NEW YORK, June 3 (Reuters) - SpaceX publicly set a $135 price for shares in its initial public offering on Wednesday, upending the longstanding Wall Street price-discovery apparatus and underscoring Elon Musk’s determination to raise record sums his way.

However, SpaceX can only play this card once. The real test will come about six months after the IPO, when all lock-up provisions for insiders and employees, excluding Musk, expire, and SpaceX is already in most major indexes.

"Out of an abundance of caution, NASA has directed all four of the agency's SpaceX Crew-12 members and NASA astronaut Chris Williams to assume an elevated safety posture in the Dragon spacecraft while the repair is underway.

The soon-to-be-public company's size and quick inclusion into major market indexes are unprecendented.

Projections banks shared with top investors show how they are selling the rocket maker’s $1.77 trillion valuation.

If SpaceX’s IPO goes off as planned, it’ll be a pivotal moment for many of the company’s thousands of employees, who’ll finally be able to sell shares into the public market.

If SpaceX's stocks do sell for $135, it's expected to raise $74.4 billion from the IPO, making it the biggest in history and giving the company a valuation of approximately $1.75 trillion. It could also make Elon Musk the very first trillionaire.