SPY Nears Highs Ahead of U.S. CPI Data

That tension is showing up in the S&P 500 ETF. SPY closed at 770.56 on Aug. 11, just under its recent highs around 773, with the ETF trading well above its 200-day moving average of 701.21 and its 50-day average of 747.34. That leaves the market in a technically constructive position, but also vulnerable to any inflation surprise that forces a rapid repricing of rates.

The market’s nervousness is justified. The U.S. consumer price index has been running with annual gains around 3% to 4% in recent readings, while core prices have remained sticky even as headline inflation eased at times on energy and food. Traders are effectively waiting to see whether disinflation is reasserting itself or whether price pressures are still embedded enough to keep policy tight.

For investors, the implication is straightforward: the next move is less about chasing index momentum and more about positioning for the winners and losers from rates. A cooler CPI would favor megacap growth, software, semiconductors and long-duration assets that have already benefited from the AI capex boom. A hotter print would strengthen financials and energy relative to other sectors, but would also likely hit small caps and highly valued growth names.

Our thesis is that the market is still underestimating how quickly inflation data can change the leadership within equities. If CPI comes in soft, the next leg higher could be powered by the same companies with the strongest balance sheets, the deepest AI infrastructure spending and the most pricing power. If it surprises to the upside, investors will be forced back into cash-flow durability and shorter-duration trades.

The key takeaway is to stay aligned with the inflation path, not the day-to-day noise. In this tape, CPI is not just another data point — it is the catalyst that can reset valuations across the entire equity market.