US stock markets this week: Dow, S&P 500 and Nasdaq jump 0.7%; SpaceX becomes a $2.1 trillion giant

Wall Street ended the week up 0.7% as investors positioned for the Fed's upcoming policy decision. Easing oil prices and SpaceX's successful market debut, which valued the company at $2.1 trillion, lifted sentiment, though AI stock volatility and Iran negotiation developments remained areas of concern.