(Bloomberg) -- Wall Street traders gearing up for the Federal Reserve decision sent stocks lower as oil jumped, with the market also bracing for results from two of the biggest artificial-intelligence spenders.

Asian stocks tumble as AI valuation concerns and Middle East tensions create market volatility ahead of key tech earnings.

Oil prices jumped after fresh attacks in the Middle East shattered the relative calm of recent days in the US-Iran war as investors fret about the impact of depleting supplies on…