Set to be released this evening at 20:30 Beijing time by the US Labor Department, the August Consumer Price Index (CPI) data arrives at a critical juncture for markets. Following the European Central Bank's 25-basis-point rate hike on Thursday and a hotter-than-expected US Producer Price Index (PPI) reading of 5.4%, traders have increasingly priced in a Federal Reserve move in September.

According to the CME FedWatch tool, the probability of a September rate increase has now surpassed 70%. Market consensus anticipates the headline CPI year-on-year figure to hold steady at 3.4%, matching the prior reading, while the core CPI rate is forecast to dip slightly to 2.4% from 2.5% previously.

While these expectations suggest a cooling inflation trend, this appears to contradict the recent resurgence indicated by the PPI data. This raises a critical question: is tonight's CPI release more likely to surprise to the upside, or will it fall short of these forecasts?

Historical data reveals a strong correlation between US CPI figures and international crude oil prices. By assessing the prior month's oil price movements, one can often gauge the likely direction of the CPI report. An analysis of the charts shows that the year-on-year CPI growth rate has recently followed WTI crude oil prices in a peak-and-decline pattern, currently resting near a relative low point.

However, crude oil began a rally in mid-August and has since broken through the $100 per barrel mark. This suggests the CPI curve is highly likely to mirror this upward trend, potentially leading to stronger-than-expected inflation data. Consequently, we believe the market's forecast for steady headline CPI and a slight decline in core CPI may not materialize.

It is more probable that the August figures will show a notable increase compared to both the previous month and current forecasts. A key risk factor exists, however: WTI crude dipped below $70 in June. Whether this earlier price drop will negatively impact the August CPI figures remains uncertain. Logically, oil's influence on inflation operates with a lag, but the exact duration of this delay—whether weeks or months—is unclear. Current market pessimism regarding the August CPI report likely stems from concerns about the leftover effects of that June oil price slump.

Another significant element influencing US inflation is the development of artificial intelligence. Capital expenditures by high-tech firms on AI are a major driver of current macroeconomic demand. The labor market's resilience, maintaining a low 4.1% unemployment rate, can be attributed not only to general economic strength but also to employment gains fostered by the AI sector. Rising prices for information technology and computer-related end-user goods could push the August CPI figures beyond both the previous month's data and current market expectations.

The primary channel through which US CPI data impacts the dollar index is its influence on Federal Reserve monetary policy. Recent trends show that while US CPI has risen noticeably this year, the Fed has simultaneously been in a rate-cutting cycle. This contradictory situation stems from the central bank's prior assessment of the macroeconomic outlook.

The former Fed Chair had persistently believed that tariff policies would lead to a US economic recession, prompting efforts to lower benchmark rates. Unexpectedly, a conflict between the US and Iran in the first quarter led to a rapid surge in international oil prices, subsequently driving a sharp spike in domestic inflation.

If the Fed were to maintain its accommodative policy stance, inflation could spiral out of control. Given this context, a September rate hike appears to be a necessary step to recalibrate market expectations and moderate demand. Tonight's CPI data holds immense significance; a surprisingly weak reading could dash hopes for a September move, whereas a significantly higher-than-expected figure would solidify rate hike bets and potentially trigger a rebound in the dollar index from its current lows.

Risk Warning and Disclaimer: Markets involve risk, and investment requires caution. The content above represents only the analyst's personal views and does not constitute any investment advice. This report should not be considered the sole basis for decision-making. Analyst opinions may change over time, and updates will not be provided separately.