U.S. tech giants lose $800 billion in market value as Tesla drops 14%

Article by: Tide Research

Tech giants have once again pushed their AI capital spending to new highs, but Alphabet’s strong earnings report failed to quell market concerns over return on investment, causing the Magnificent Seven index to lose nearly $800 billion in market value in a single day. Tesla was hit hardest, plunging over 14%—its largest single-day drop since March 2025—after reporting second-quarter net profit below expectations and a continued decline in gross margin. Google fell more than 7%, with its total market cap dipping below $4 trillion. Geopolitically, Houthi militants launched missile and drone attacks on two Saudi oil tankers, pushing Brent crude briefly above $100 per barrel for the first time in nearly two months. The U.S. 30-year Treasury yield has now held above 5% for multiple consecutive days, marking the longest such streak since the 2007 financial crisis.

Nasdaq fell 2.15%, the S&P 500 dropped 1.21%, and the Dow fell 0.97%. The Magnificent Seven index declined 4.8%, erasing $797 billion in market value in a single day.

Tesla plunged over 14%, posting its largest single-day decline since March 11, 2025, as second-quarter net profit fell short of expectations and gross margin continued to decline. Google dropped more than 7%, marking its biggest single-day fall since May 8, 2025, with its total market capitalization falling below $4 trillion.

Memory stocks rose against the market, potentially benefiting from news of Google increasing its AI spending; Micron Technology rose 3.2%, SK Hynix rose 2.56%, and SanDisk rose 0.69%.

WTI crude oil settled up 6.17% at $92.19 per barrel. Brent crude oil settled up 7.04% at $100.69 per barrel, reaching its highest level in nearly two months. COMEX gold fell 2% to $4,052.3 per ounce. COMEX silver fell 3.99% to $57.895 per ounce.

Bitcoin opened at $66,081.05, down 0.6% from the previous day, and briefly dropped to $65,054.55 during the day. Ethereum opened at $1,933.32, up 0.3%, but also declined during the day to $1,899.38.

Tesla’s issues this time are more severe than the market anticipated. While the revenue figures themselves are not bad—up 26% year-over-year—the real concern for investors is the sharp decline in profitability, coupled with the first net cash outflow in two years. The company attributes this to its most aggressive expansion phase since its founding, with spending on AI and robotics alone reaching $5.8 billion in a single quarter. Whether this explanation will satisfy the market will be determined by the company’s cash flow performance over the next few quarters.

Alphabet’s situation remained consistent with the assessment disclosed the previous day: revenue and cloud business growth were strong, but free cash flow turned negative for the first time in history, and the annual capital expenditure cap was raised to $205 billion. This earnings report failed to alleviate market concerns about the sustainability of AI spending, instead intensifying those worries, causing Google’s stock to drop more than 7% during trading.

Some analysts have drawn an analogy: the market hasn’t given up on AI itself, but the days are over when investors happily paid for grand promises. Now, it’s up to management to take responsibility—over the coming earnings calls, what people truly want to hear is exactly how much cash each dollar spent will generate, and no one has time to listen to visions of a decade from now.

Tech giants have issued over $500 billion in bonds to finance AI infrastructure, competing with U.S. Treasuries for the same pool of buyers and directly pushing up already elevated long-term interest rates. The yield on 30-year U.S. Treasuries has remained above 5% for multiple consecutive days, marking the longest such streak since the 2007 financial crisis.

Some fund managers have noted that now, whether it’s governments, cloud giants, or other bond issuers, everyone is competing for funds in the same pool. With more options available, traditional buyers like pension funds and insurance companies have naturally become less interested in government bonds.

Amid this wave of fundraising, coupled with the U.S. Treasury market expanding from $4.5 trillion in 2007 to $31 trillion today and debt exceeding 100% of GDP, long-term interest rates are unlikely to ease in the short term.

In terms of geopolitical developments, the Houthi armed group in Yemen launched ballistic missiles, cruise missiles, and drones against two Saudi oil tankers, one of which caught fire at the bow—fortunately, all crew members were unharmed. The incident occurred near the Bab el-Mandeb Strait, a vital waterway connecting the Red Sea and the Gulf of Aden and a critical artery for global crude oil exports.

Coupled with the ongoing tensions between the U.S. and Iran, these two factors ignited market fears over a potential supply disruption, sending Brent crude prices up more than 7% that day and briefly touching the $100 mark.

On that day, Trump also said he was "seriously considering" launching a larger-scale military action against Iran.

In terms of trade, the U.S. Trade Representative’s Office announced the imposition of tariffs ranging from 10% to 12.5% on dozens of countries and regions, citing "forced labor" as the reason, replacing the expiring global import tariffs; the new tariffs take effect on the 24th.

The final悬念 of the week rests with Intel, which will also report earnings on Thursday. Market focus, like that on other tech giants in recent days, centers on capital expenditure guidance. Next week, Microsoft, Meta, and Amazon will report—their latest statements on AI investment will determine how far this valuation reassessment will go.

What was truly shattered this day was a long-standing assumption: the market had previously been willing to grant the AI narrative substantial room for speculation, but that room is now being rapidly compressed by concrete cash flow figures. Both Tesla and Alphabet face the same issue—their spending has clearly outpaced their earnings, and investors have voiced their stance through actual sell-offs.

The counter-trend rise in memory chip stocks provides an important reference: capital continues to favor companies with visible orders and clear paths to cash flow conversion, while growing increasingly impatient with purely speculative narratives. This divergence is likely to persist in the short term, with Intel’s and several cloud providers’ upcoming earnings reports serving as the next litmus test.

Neither long-term interest rates nor oil prices are likely to ease in the short term; the former is a structural outcome of the debt-fueled AI infrastructure boom, and the latter is a direct result of escalating geopolitical conflicts. The combination of these two macroeconomic factors means that even if individual companies deliver satisfying earnings reports, the overall market valuation environment is unlikely to truly ease in the near term.