Analysts at Barclays have observed a significant divergence in Big Tech's valuation metrics, particularly between the next twelve months' price-to-earnings (P/E) ratio and free cash flow (FCF) yield, driven by rising capital expenditures in cloud infrastructure since mid-2018. This shift has resulted in a lower FCF yield, even as P/E ratios decline amid a selloff in Big Tech stocks, with forecasted capex for fiscal year 2025 increasing by over 25% for some hyperscalers. The future performance of Big Tech hinges on the return on investment from their AI initiatives, which could either propel growth or lead to a valuation reset if expectations are not met.