Economic Event · monthly

Consumer Price Index (CPI)

Source: Bureau of Labor Statistics (BLS)Release: ~10th-15th of monthTime: 8:30 AM ET

The Consumer Price Index measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. The Bureau of Labor Statistics releases CPI monthly, typically around the 10th-15th of each month, covering the prior month's data. CPI is the most-watched inflation gauge in markets. It drives real interest rate calculations, TIPS breakevens, and Federal Reserve policy deliberations. The headline number captures all items including food and energy, while core CPI strips out food and energy for a cleaner read on underlying price pressure. Traders also scrutinize shelter (weighted ~35% of core), services ex-housing (the Fed's preferred slice for gauging demand-driven inflation), and goods categories.

Why It Matters

CPI releases have driven some of the most violent market moves of the post-pandemic era. The November 2022 CPI print that came in softer than expected triggered the largest single-day S&P 500 rally since 2020. Conversely, the September 2022 CPI beat sent stocks down 4.3% in a day and sealed the Fed's 75bps hiking path. Pre-2021, CPI rarely moved markets meaningfully because inflation sat near the Fed's target for a decade. Post-pandemic, every print became a regime question, is inflation transitory? Is it sticky? Is the Fed behind the curve? The release now regularly produces multi-sigma moves across rates, equities, FX, and gold.

What to Watch For

•Headline CPI year-over-year vs consensus
•Core CPI (ex food and energy) vs consensus
•Month-over-month core, the sequential read
•Shelter inflation trajectory
•Services ex-shelter (supercore), Fed's preferred gauge
•Breadth: how many categories are running hot vs cool

Market Reaction Pattern

A hot CPI print typically triggers: rates up across the curve (especially 2Y), dollar up, equities down (tech/duration-sensitive hit hardest), gold down if real yields rise. A cold print produces the mirror image: rates down, dollar down, equities rip higher, gold up.