Flat July PPI + the first 7,800 S&P close reset September: the “hawkish-hold” trade dies, but only because AI/tech keeps leading

Two releases landed on the same “Fed decision pathway” that investors were using in early August: July PPI was unchanged in the month, and headline CPI still rose 3.4% year over year. That combination mechanically reduces the probability that policymakers need to respond with another tightening step in September, even as the S&P 500’s tape keeps proving that risk appetite is being paid for in rate-sensitive tech.

Investors don’t trade CPI in isolation—they trade what CPI implies about the next 1–2 quarters of inflation dynamics and therefore about the need for additional policy tightening. A flat monthly PPI headline is a direct hit to the “pricing power is re-accelerating” story, because it suggests fewer cost pressures are propagating downstream. At the same time, CPI remaining at 3.4% y/y keeps the equilibrium narrative intact: disinflation can continue without demanding a new cycle of hawkish repricing.

A “rates up, equities down” shock usually hits the long-duration portion of the complex first—where investors discount future cash flows most aggressively. In this print cycle, the disinflation rotation returned (because PPI didn’t add incremental pressure), but it didn’t broaden into cyclicals as the dominant force. Instead, the index’s composition still tilts toward AI/semiconductors, where falling or stable inflation helps financing conditions and capex planning even without requiring a rapid inflation collapse.

When the September-hike trade breaks, it doesn’t just mean “rates are lower.” It means the discount rate applied to future cash flows becomes less punitive. That tends to benefit AI/semiconductor and platform tech disproportionately—especially when index leadership is already concentrated there. Below are the closest listed proxies whose fundamentals are consistent with tech staying in the driver’s seat after the macro impulse weakened.