Second-quarter earnings season is entering its final stretch. After a dense mid-summer stretch of reports, just 11 S&P 500 companies are scheduled to report this week, with only 13 more set for the following week as the season winds down. With most of the data now in, the aggregate season looks solid — but the aggregate number, as usual, hides more interesting divergence underneath it.

The Season in Numbers

Taken as a whole, corporate earnings across the S&P 500 have generally come in ahead of expectations this quarter, continuing a pattern from recent quarters of companies clearing lowered bars set by cautious analyst forecasts. This week's earnings calendar is comparatively light, a signal in itself that most of the significant reports — and most of the market-moving surprises — have already happened. What that light calendar does is shift market attention away from company-specific news and toward the macro data releases due this week, particularly Wednesday's Consumer Price Index and Thursday's Producer Price Index reports for July.

Three Sectors Doubling, One Sector Shrinking

The most notable underlying story of this earnings season is sector-level divergence. According to a recent market strategy analysis, three S&P 500 sectors are seeing their earnings more than double compared with a year earlier — a genuinely strong performance by historical standards. At the opposite end, healthcare stands out as the only sector seeing earnings decline this season, down roughly 7.5% year over year, despite revenue in the sector actually growing 7.6% over the same period.

Why Healthcare Is the Outlier

The healthcare sector's combination — rising revenue alongside falling earnings — is worth sitting with for a moment, because it points to a margin problem rather than a demand problem. Revenue growing while profit shrinks typically means costs are rising faster than sales, or that pricing power has weakened, or both. This is a meaningfully different situation than a sector where both revenue and earnings are declining together, which would more clearly signal falling demand. A margin squeeze can stem from several sources — rising input or labor costs, pricing pressure from payers or regulators, or one-off charges tied to specific companies within the sector — and distinguishing between a temporary versus a structural margin problem generally requires looking at individual company reports rather than the sector aggregate alone.

This Week's Inflation Data Adds Another Layer

With earnings season largely behind it, the market's attention this week shifts to July's inflation data. Consensus forecasts compiled by Bloomberg point to a modest 0.1% rise in headline CPI and 0.2% in core inflation (which excludes food and energy), with oil prices having declined over the month acting as a moderating factor on the headline number. A print in line with these expectations would likely reinforce the market's current lean toward the Fed holding steady rather than moving toward the rate-hike scenario some officials have floated; a hotter-than-expected number would complicate that picture considerably, particularly given the Fed's own recent signals about being open to a hike if inflation data runs hot. For more on how this specific dynamic is shaping currency and rate expectations, see our related coverage on the Fed's credibility discount.

The Lesson in Averages

The broader takeaway from this earnings season is a useful, recurring reminder: index-level or "average" performance figures can look reassuring while masking meaningfully different stories happening at the sector or company level. A market or index posting solid aggregate earnings growth can still contain sectors under real margin pressure, just as a record-setting index close (as covered in our earlier coverage of last week's rally) doesn't mean every stock or sector within that index is participating equally. For anyone building or reviewing a portfolio, this is part of why looking past headline index or aggregate-earnings numbers into sector and company-level detail matters — a theme we cover in more depth in our guide on building an investment research checklist.