CPI, PPI, and Fed Rate Decisions: Frequently Asked Questions

What's the actual difference between CPI and PPI?

CPI measures prices consumers pay at the retail level; PPI measures prices businesses pay each other further up the supply chain, before goods reach a shelf. PPI tends to lead CPI, since cost pressure businesses absorb today often gets passed through to consumers later. As of July 2026, core PPI (4.7% year-over-year) was running well above core CPI (2.5%), suggesting businesses were still absorbing more cost pressure than they'd passed on (BLS, Aug 13, 2026).

Why did the Fed hold rates instead of cutting or hiking in July?

The July 29 FOMC statement described economic activity as "expanding at a solid pace despite elevated uncertainty," and the committee voted 9-3 to hold the target range at 3.50%–3.75%, with three regional Fed presidents dissenting in favor of a hike. A split vote like that generally signals genuine disagreement within the committee about whether still-elevated core inflation (2.5% CPI, 4.7% PPI) outweighs signs of a softening labor market (Federal Reserve, Jul 29, 2026).

Why do stocks sometimes rise on weak economic data?

When weak data — like a soft jobs report — lowers the market's expectation of a near-term rate hike, it also lowers the discount rate investors apply to future corporate earnings, which mechanically supports higher valuations. This "bad news is good news" pattern only holds when weak data reads as rate relief. When weak data instead signals falling demand and revenue risk — as with July's retail sales decline — it tends to weigh on stocks instead, because it's hitting the earnings side of the valuation math rather than the discount-rate side.