Forget about the May inflation report! The most anticipated event of the week, if not the year, is slated for Friday, June 12. This will mark the debut of Elon Musk's artificial intelligence (AI) and space economy conglomerate, SpaceX, which is raising $75 billion with its initial public offering (IPO).

The Dow Jones Industrial Average (DJINDICES: ^DJI), S&P 500 (SNPINDEX: ^GSPC), Nasdaq Composite (NASDAQINDEX: ^IXIC), and Nasdaq-100 have been abuzz ahead of this historic event. Aside from raising the bar for the largest-ever cash raise, we've witnessed a flurry of rule changes by brokerages and the committees that oversee index inclusion ahead of SpaceX's public debut.

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But changes aren't always made for the betterment of retail investors. A series of structural shifts on Wall Street, coupled with a SpaceX prospectus that managed to disappoint already low expectations, is poised to leave retail investors holding the bag.

The SpaceX IPO is a transfer of wealth from retail investors to company insiders

One of the ways Wall Street has failed retail investors ahead of the SpaceX IPO is by altering the inclusion criteria for several major indexes.

In an apparent effort to court SpaceX to list its shares on the Nasdaq (NASDAQ: NDAQ) exchange, the Nasdaq-100 changed its methodology to allow megacap IPOs "Fast Entry" into the index. These changes, which became effective on May 1, shorten the timeline for entry into the Nasdaq-100 for non-financial companies that would rank among the 40 largest in the index. Instead of the typical three-month wait to enter the Nasdaq-100, SpaceX can gain inclusion after just 15 trading days.

Additionally, the Nasdaq-100 adjusted the inclusion rules for newly public companies with low floats.

But the Nasdaq-100 isn't alone. The U.S. Russell Equity Index Series shortened SpaceX's inclusion timeline to just five trading sessions post-IPO. Five!

S&P Dow Jones Indices, a division of S&P Global, had been considering changes to allow SpaceX fast entry into the benchmark S&P 500, but ultimately decided against amending its inclusion rules.

We've also witnessed select brokers throwing age-old minimum account requirements out the window to drum up interest in the SpaceX IPO. Fidelity slashed its minimum account requirement for retail investors to participate in the upcoming IPO from $500,000 to just $2,000.