The Biggest Suspense of the Week: Mag 7 Earnings, Can They "Extend the Life" of US Stocks?

The earnings season for tech giants is becoming the most critical variable in whether US stocks can reignite their upward momentum.

This week, Alphabet and Tesla will be the first to disclose their quarterly results after the market close on Wednesday, kicking off the tech earnings week. According to FactSet data, the Mag 7 are expected to achieve a year-over-year earnings growth of 31.1% in the second quarter, higher than the 22.8% for the rest of the S&P 500 constituents. Meanwhile, the Roundhill Magnificent Seven ETF (MAGS), which tracks these seven tech giants, has rebounded more than 4% since July, halting its decline from a 9% single-month drop in June. The S&P 500 closed down 1.6% last week and has failed to set new historical closing highs in the past six weeks.

However, whether earnings can truly act as a catalyst remains uncertain. Michael Hartnett, Chief Investment Strategist at Bank of America, warned that the bank's bull-bear indicator has risen to a historical extreme of 9.6, indicating that the market is in a state of "extreme positioning." He advised investors to "retreat from risk assets in the summer and shift towards duration, defensive assets, high-dividend stocks, and the US dollar." Geopolitical risks are also not to be ignored—Trump's renewed blockade of Iran's Strait of Hormuz has pushed Brent crude oil prices back above $87 per barrel.

Mag 7 Returns: From "Outcasts" to "Safe Harbors"

The speed of the Mag 7's recovery has caught the market's attention. The MAGS ETF, which covers Nvidia, Apple, Alphabet, Meta, Microsoft, Amazon, and Tesla, fell 9% in June, marking its second-worst monthly performance since inception. Since entering July, the ETF has cumulatively rebounded more than 4%, with latest data as of mid-week showing a gain of over 7%.

This rebound was primarily driven by Apple and Meta. Apple rose about 15% in July, reclaiming its position as the company with the highest market capitalization globally; Meta rose 14.7% during the same period, according to FactSet data.

John Campbell, Senior Portfolio Manager at Allspring Global Investments, attributed this phenomenon to "earnings security." He pointed out that the Mag 7 have long been the core engine of earnings growth for the S&P 500 and are the preferred targets for obtaining high-quality earnings growth. "Now it looks more like a defensive trade, with some pre-positioning by investors before the earnings season," he said.

High Index Concentration, Giants' Performance Drives the Whole

The Mag 7 collectively account for more than 30% of the total market capitalization of the S&P 500. This structure determines that the rise and fall of the index largely depend on the performance of these seven stocks.

Steve Sosnick, Chief Strategist at Interactive Brokers, used a cruise ship analogy to describe market rotation: "Investors are rotating from AI 'manufacturers' back to AI 'users.' It's like people on a cruise ship moving from one side to the other; when that side becomes too crowded, they move back."

He also emphasized that although sectors like semiconductors are large in size, their ability to replace the Mag 7 in supporting the entire market index is limited. "When an index is highly top-heavy, the companies at the top must at least keep pace with the market; otherwise, it will be difficult for the broader market to sustain its rise."

Recent structural features of the market confirm this logic: the semiconductor and memory chip sectors came under heavy pressure in July, with the Philadelphia Semiconductor Index (SOX) falling 13% for the month. The rebound of the Mag 7 partially offset this drag, keeping the S&P 500 roughly flat compared to a month ago.

Strong Earnings Expectations, But Not Without Risks

Earnings data provide considerable support for the Mag 7 as a whole. John Butters, Senior Earnings Analyst at FactSet, pointed out that the group's expected earnings growth rate of 31.1% in the second quarter offers a relative advantage.

However, he added that among the top five companies in the S&P 500 with the highest expected earnings growth rates, Micron Technology, Chevron, ExxonMobil, and Broadcom are not part of the Mag 7, showing that earnings highlights are distributed across a broader market.

Market analysts pointed out that earnings results could be a double-edged sword: rather than boosting the Mag 7 as a whole, they are more likely to further differentiate winners and losers in the AI trade—companies that can already monetize AI capital expenditures will be rewarded, while those still "burning cash for promises" face punishment.

Hartnett Warns: Tail Risks Under Extreme Positioning

As optimism rises on all sides, Bank of America issued a more cautious warning. In his latest "Flow Show" report, Hartnett noted that the bull-bear indicator reached a historical extreme of 9.6, corresponding to a historical optimal strategy of avoiding risk.

Latest fund flow data from EPFR shows that US assets saw a net inflow of $55.8 billion this week, with the tech sector accumulating $48.8 billion in inflows over three weeks, setting a historical record; meanwhile, money market funds recorded a net outflow of $119.6 billion, the largest single-week scale since April 2026. Hartnett described this massive influx of cash into tech stocks as "institution-led, desperate momentum chasing."

He listed MAGS as a key indicator to watch: If it falls below $65, it will drag down cyclical sectors; if it breaks above $70, it constitutes a signal to re-enter the market.

Hartnett also highlighted the biggest tail risk: once hyperscale tech companies announce cuts in AI capital expenditures and fail to push the Mag 7 to new highs, it will trigger a dual negative impact on growth expectations and asset prices, catalyzing large-scale sell-offs in banking, brokerage, and industrial stocks.

Geopolitical Risks and the Fed Add Extra Variables

Beyond earnings, the market faces two other uncertainties this week.

Trump last week reimposed a blockade on Iranian shipping in the Strait of Hormuz. According to FactSet data, Brent crude oil prices subsequently returned to above $87 per barrel. John Campbell stated, "The stock market is too complacent about geopolitical tensions and the resulting macro impacts, which causes me a certain degree of concern."

In addition, the Federal Reserve will hold its interest rate meeting from July 28 to 29. Soaring oil prices and uncertainty about inflation prospects add further variables to already complex interest rate expectations—although inflation data declined in June, divergence in the market regarding the subsequent path has not dissipated.