The aggressive expansion of AI data center capacity is stirring up serious concerns in fixed income markets. CoreWeave and Oracle's substantial borrowing spree to fund their infrastructure buildouts has triggered a notable spike in bond yields and credit default swap premiums. Investors are clearly pricing in heightened risk as these companies ramp up debt levels to compete in the rapidly scaling AI infrastructure arms race. The bond market reaction suggests traders are carefully watching whether these aggressive capital deployments will translate into sustainable returns or become a liability down the line.