Friday's CPI print carries outsized weight because it is the final inflation data point the Fed sees before next week's September 15-16 meeting, and Thursday's hotter than expected PPI report already pushed the market-implied odds of a 25 basis point hike to above 70% on the CME FedWatch gauge, up from around 62% before that data. A core CPI reading in line with the 0.22% median forecast from the 17 banks surveyed (see screenshot below via WSJ) would likely keep those odds roughly where they are, while anything printing meaningfully above that level would further cement hike expectations and could push Treasury yields higher still after their sharp Thursday move. Conversely, a softer than expected core reading would inject some genuine uncertainty into what currently looks like a near-locked-in outcome. Energy prices remain a wildcard sitting outside the headline core figure, since oil's surge above $100 a barrel on Middle East tensions is expected to show up more directly in the headline number than in core, meaning traders will likely parse the two figures separately rather than reacting to the headline alone.Friday's CPI is effectively the tie-breaker for whether the Fed hikes next week, and Wall Street's forecasts are unusually tightly clustered around a 0.2% core reading.Summary:The Bureau of Labor Statistics releases the August CPI report Friday, September 11 at 8:30am ET, the final inflation data before the Fed's September 15-16 policy meetingMedian forecasts across 17 banks surveyed by the Wall Street Journal point to headline CPI of 0.38% month on month (3.4% year on year) and core CPI of 0.22% month on month (2.4% year on year)All 17 individual core CPI estimates, ranging from 0.16% to 0.24%, round to 0.2%, an unusually tight consensusThursday's PPI report showed firm pricing in components that feed into the Fed's preferred PCE inflation gauge, raising the possibility that a consensus CPI print could translate into a slightly higher core PCE reading for AugustFollowing Thursday's PPI data, CME FedWatch pricing showed the odds of a 25 basis point September rate hike rising to more than 70%, up from around 62% beforehandSurging oil prices tied to Middle East tensions are seen as a factor likely to lift the headline figure more than the core reading, adding a layer of complexity to how markets interpret Friday's dataFriday's August CPI report carries more weight than usual, arriving as the last major inflation data point the Federal Reserve will see before its September 15-16 policy meeting, where officials led by Chair Kevin Warsh will decide whether to deliver the first rate hike since 2023. The Bureau of Labor Statistics releases the report at 8:30am Eastern time, and economists widely agree the outcome could tip a finely balanced decision in either direction.Forecasts compiled from 17 banks by the Wall Street Journal point to a median headline CPI reading of 0.38% month on month, translating to 3.4% year on year, alongside a median core CPI reading of 0.22% month on month and 2.4% year on year. What stands out in the survey is how tightly clustered the core estimates are: every one of the 17 individual forecasts, spanning a range of 0.16% to 0.24%, rounds to the same 0.2% figure. That kind of consensus is relatively unusual and suggests economists see limited scope for a major surprise in the underlying trend, even as the exact print will still matter for market pricing.The stakes were raised further by Thursday's producer price index report, which came in hotter than expected and included firm readings in components that feed directly into the Fed's preferred inflation gauge, the personal consumption expenditures index. That raises the possibility that even a consensus-matching CPI print could translate into a slightly firmer core PCE figure for August than markets currently expect. In the immediate aftermath of Thursday's PPI data, traders pushed the probability of a 25 basis point rate hike at next week's meeting above 70% on the CME Group's FedWatch tool, up from roughly 62% beforehand, according to market pricing.Energy costs add another layer to Friday's release. Oil prices have surged past $100 a barrel amid escalating tension linked to the Middle East conflict, a dynamic expected to show up more prominently in the headline CPI figure than in the core reading, which strips out food and energy. That divergence means market participants are likely to weigh the two numbers separately: a firm headline print driven mainly by energy costs would carry a different signal for Fed policy than a core reading that surprises to the upside on more persistent, demand-driven price pressure. With futures already leaning toward a hike and estimates unusually aligned around a 0.2% core reading, Friday's data has the potential to either confirm what markets have largely priced in or, if it deviates meaningfully from consensus, reopen genuine uncertainty heading into next week's Fed decision. This article was written by Eamonn Sheridan at investinglive.com.