Big Tech props up a Wall Street rebound as chips end an eight-day slide — but credit spreads hit record highs

Big Tech bought Wall Street a reprieve: the Nasdaq 100 climbed 1.2% on Monday and the semiconductor index broke its eight-session losing streak — the longest since October 2008 — but the credit cracks beneath the market are not closing; they are seeping into equities, with datacenter investment-grade spreads at three-month wides and CoreWeave round-tripping a 7% surge after a Goldman upgrade^[1][2].

The quality of the rebound: giants up, AI index at new lows

On the tape, the semiconductor index bounced about 2.5% after its 2008-worst eight-day slide; megacaps did the propping, with AI and chip buying concentrated in Mag7 names as tech and consumer discretionary led the tape^[1]. Single stocks: Amazon gained 4.98% to $262.45 to lead the complex, Tesla rose 3.76% to $368.06, Intel added 2.43% to $92.03 (after an intraday spike to 95.39), AMD gained 1.76% and Nvidia 1.38% to $217.09; the beaten-down newcomers repaired — Palantir up 4.36%, Snowflake up 2.77% — while Meta (-0.55%) and Apple (-0.15%) closed modestly lower^[2]. Under the surface, though, the rebound is poor quality: the composite AI index faded from a strong open to fresh lows, cloud services barely held gains, the S&P 500 reclaimed its 50-day moving average without breaking higher, and the market remains in negative gamma with 7700 the key boundary^[1]. Goldman's desk described liquidity as "wait-and-see" — activity just 3 out of 10, real-money funds net buyers (preference 15% above sellers, focused on consumer, macro products and financials) while hedge funds sold tech-media-telecom^[1].

The credit cracks: CoreWeave round-trips, spreads widen everywhere

Before Monday's open, Goldman upgraded CoreWeave to buy; the bonds rallied and the stock jumped more than 7% — then failed. The 2032 bond's spread stayed stuck near 1,000 basis points, distressed territory, and the stock closed back at Friday's low^[1]. The broader picture is deteriorating too: datacenter credit spreads kept widening, investment-grade spreads hit three-month wides, hyperscaler-linked spreads reached record highs, and datacenter CDS hovered near records — per Goldman, the divergence between credit markets and equity risk is expanding markedly^[1]. Bloomberg's Frank Monkam is blunter: the S&P 500 downside exposure index (SDEX) has rebounded nearly 20% from its early-October low to the highest since March, and "the channel for macro stress to transmit into risk assets is being opened from the credit side"^[1].

The unknown liabilities: S&P flags hidden guarantees

S&P Global added a new warning dimension at a London roundtable: AI-related liabilities at the world's biggest tech companies may far exceed disclosed levels. Mark Habib, head of digital infrastructure, said hyperscalers may carry off-balance-sheet obligations through implicit guarantees to datacenter construction or smaller AI companies — "it is reasonable to assume there is more (debt) that we cannot see" — and if such deals sit outside rating coverage, S&P may not see them either^[3]. S&P also expects the six US hyperscalers — Amazon, Microsoft, Alphabet, Oracle, Meta and SpaceX — to spend over $7 trillion combined on datacenter and AI capex between 2025 and 2030, staying in negative free cash flow until at least next year; Habib said there is currently "no major disconnect forcing a rating change," but that could shift if spending is judged unsustainable — in July, S&P cut Oracle to BBB-, the lowest investment-grade rung, citing excessive AI spending and an uncertain profit path^[3].

Supply-side bright spots and the week ahead

Industry news skewed positive: Reuters reports that Nvidia-backed cloud provider Nscale is in talks with Anthropic on an AI-cloud deal worth roughly $45 billion; Micron and other oversold chip stocks revived, with UBS calling AI fundamentals intact; Tenstorrent raised $1.5 billion to push into AI servers and chip IP^[2]. Geopolitics and rates added fresh friction: WTI crude is back above $100, and oil pressure plus $25 billion of new IG supply pushed the 10-year Treasury yield up some 5–7 basis points to 5.14%^[1]. Two main lines this week: Meta and other Big Tech earnings and their capex language, and the industrial signals from Nvidia's GTC Berlin — until the credit cracks close, whether the rebound lasts depends on whether earnings re-anchor expectations of profit delivery^[1][2].