Big Tech's AI spending spree tests investor patience on cash flow

Investors are increasingly scrutinizing Big Tech's free cash flow this earnings season as companies ramp up AI infrastructure spending amid high borrowing costs, raising concerns about whether massive AI investments can generate returns quickly enough. Alphabet, Amazon, and Meta reported negative free cash flow, while Microsoft was rewarded for funding its expansion without constant capital market reliance. Alphabet's Google Cloud revenue more than doubled to $30.71 billion, but free cash flow turned negative at $9.07 billion, missing analyst expectations, while search and YouTube ad growth slowed, causing shares to fall 13%. Amazon consumed $42.4 billion in cash over twelve months due to capex of $77.26 billion, despite AWS revenue growing 39%, and Meta reported negative free cash flow of $2.12 billion while raising its capex outlook. Some experts downplay the cash burn concerns, noting that negative free cash flow can be temporary during capacity investments, citing Walmart's 14-year negative FCF period that still created value. Microsoft stands out with $18.6 billion in free cash flow and 48% Azure growth, while Alphabet's established operations and strong balance sheet provide a cushion unlike unprofitable AI startups.