Wall Street is counting down to what could be the biggest market debut in history, with SpaceX preparing to go public. The IPO is expected to value the company at $1.75 trillion and make founder Elon Musk the world's first trillionaire. Also, US inflation has surged to its highest level in three years, driven by rising energy prices since the start of the war with Iran. President Donald Trump has hailed the figures as "great".