Traders brace for the big July CPI number. Here’s what JPMorgan thinks may happen

Investors are keenly focused on Tuesday's July Consumer Price Index report, which is the final inflation data point before the Federal Reserve's Jackson Hole symposium and September policy meeting, significantly influencing interest rate expectations and equity market direction. While a stronger inflation print could temper hopes for a rate cut and pressure the all-time high stock market, JPMorgan remains 'Tactically Bullish,' projecting supportive macro data. Their analysis indicates a 65% chance of core monthly CPI between 0.30% and 0.40%, suggesting the S&P 500 will be little changed or moderately higher, though a hotter reading remains a key risk.

Analysis

The market is intensely focused on the upcoming July consumer price index (CPI) report, viewing it as a critical determinant for equity direction ahead of the Federal Reserve's Jackson Hole symposium and September policy meeting. With the stock market at all-time highs, investors are weighing the possibility of a Fed interest rate cut against the risk that a strong inflation print could eliminate that prospect, especially following recent jobs data that pointed to a softening economy. JPMorgan's trading desk offers a 'Tactically Bullish' perspective, arguing that while inflation is rising, it has not yet constituted an 'inflation shock' similar to 2021-2022. They suggest the market can tolerate gradual price increases unless core year-over-year inflation approaches 4.0%, a level they see as a credible threat for a rate hike. JPMorgan has outlined specific scenarios, assigning a 60% combined probability to a core month-over-month CPI reading between 0.30% and 0.40%, which would likely see the S&P 500 fluctuate between a 0.75% loss and a 0.75% gain. The key risk remains a hotter-than-expected print, with a 5% chance of a reading above 0.40% potentially causing a market drop of 2% to 2.75%.

Key Decisions for Investors

• Monitor Tuesday's core month-over-month CPI print as the key short-term catalyst; a figure within the consensus 0.30%-0.40% range is the base case, but a deviation above 0.40% would signal a significant risk-off event.
• Consider positioning for a binary outcome, as JPMorgan's analysis suggests a high probability of a muted market reaction but outlines pronounced downside for a hotter-than-expected reading.
• For investors aligned with the 'Tactically Bullish' view, an in-line or cooler CPI report could reinforce the bull case, whereas a hot print would necessitate a reassessment of exposure to rate-sensitive assets.
• Look beyond the immediate data release to the subsequent Fed commentary from Jackson Hole, as policymakers' interpretation of the inflation trend will ultimately shape expectations for the September meeting and future rate path.