GraniteShares has filed for a YieldBOOST ETF tied to SpaceX, aiming to offer retail investors a unique income-generating opportunity linked to the world's most valuable private company. This ETF would employ a creative structure to gain exposure to SpaceX, which is not publicly traded, by potentially using pre-IPO shares or secondary market positions. The YieldBOOST strategy focuses on generating weekly income through selling put spreads, a method that involves collecting option premiums while accepting downside risk. The proposed ETF would join GraniteShares' existing YieldBOOST suite, which includes products linked to high-profile companies like Tesla and Nvidia, and manages over $428.2 million in assets. The SpaceX-linked ETF would be one of the most ambitious offerings yet, given the challenges of creating derivatives exposure to a private company. The filing reflects a broader trend of ETF issuers seeking to bridge the gap between private markets and retail investors, though regulatory approval remains a key hurdle.