SpaceX, Elon Musk’s pioneering space and technology giant, has taken a bold step into the debt markets.

On Monday, the company officially commenced its inaugural offering of senior unsecured notes, marking the first time it has issued investment-grade dollar bonds.

This move comes just days after SpaceX’s record-breaking initial public offering (IPO) in mid-June, where it raised $75 billion by selling shares at $135 each. The IPO valued the company at around $1.77 trillion, making it one of the world’s most valuable public companies right from the start.

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Why bonds now?