Big Tech's asset efficiency (Revenue / PP&E) has dropped from 2.2x in 2023 to ~1.1x projected for 2026. Furthermore, Capex spending now exceeds operating cash flow for Amazon (133%), Meta (106%), and Alphabet (103%). Management is effectively betting the entire company's cash flow on AI infrastructure. While they view this as an existential necessity to avoid falling behind, shareholders are only tolerating the margin compression because they expect massive future ROI. The clock is ticking. These companies have until the end of 2026 to prove that 2027 will bring *profitable* growth (margin expansion). If they fail, the "vote of confidence" premium in their stock prices will vanish. If AI generates massive, high-margin revenue sooner than expected, these stocks will justify the spend. Conversely, if they cut spend, they risk obsolescence.