US stocks weekly: AI unwind

** S&P 500 .SPX drops 1.9% as AI jitters exact a toll .N

** Dow .DJI adds 0.7%, but tech-heavy Nasdaq Composite .IXIC sheds 4.5%

** Dow tries to build a base, but resistance looms ahead

** This as tech's lead over banks faces another test

** US 10-Year Treasury yield spikes to as high as about 5.33%, then pulls back to end around 5.09% as investors look for shelter US/

With the reversal, support comes into view

** Only a minority of sectors fray: Technology unravels, while defensive groups Healthcare and Consumer Staples help hold the line

** Tech .SPLRCT plummets 6.4%. Chip stocks dive as rate-hike fears stoke AI spending concerns, and Nvidia NVDA.O-backed neocloud firm CoreWeave's CRWV.O $50 bln debt load compounds worries over higher borrowing costs

Semiconductor index .SOX plunges >11%. SOX now down 8 straight days, though skid puts reversal in focus as most oversold since Apr 2025

AI infrastructure firms slump as rate hike bets rise, as red hot CPI report fuels rout, including in AI server makers Dell DELL.N and Hewlett Packard Enterprise HPE.N

** Consumer Discretionary .SPLRCD falls 1.9%. Tesla TSLA.O initially climbs on Fri on Roadster refresh, touts rocket-style thrusters. Though TSLA finishes session in the red, down 7% on the week

** Financials .SPSY up 1.4%. JPMorgan JPM.N eases after Q3 profit disappoints for first time in nearly three years as market volatility slowed dealmaking, bond trading activity

Goldman Sachs GS.N edges lower after equities business posts 72% jump in qtrly rev

Citigroup C.N tumbles despite 40% jump in Q3 profit, driven by stronger investment banking, services and wealth management rev

Wells Fargo WFC.N drops as Q3 net interest income, rev miss eclipse earnings beat

Bank of America BAC.N falls after $1.2 bln Treasury-related charge to settle regulatory probes into its anti-money laundering controls, misses profit estimates

Morgan Stanley MS.N falls even after earnings topper on equity trading strength

For the week, S&P 500 banks index .SPXBK edges down 0.4%, KBW regional banking index .KRX up 1.3%

** Healthcare .SPXHC leaps 3.4%. Healthcare stocks rally as investors seek safety amid tech debt worries

Insurer UnitedHealth UNH.N rises after raising 2026 profit forecast as turnaround efforts gather pace

** Consumer Staples .SPLRCS surges 5%. Kimberly-Clark KMB.O jumps after Huggies diaper maker posts preliminary Q3 results above estimates, while it's on track to complete ~$40 bln acquisition of Tylenol maker Kenvue KVUE.N by year end

Walmart WMT.O ascends as Deutsche Bank upgrades to 'buy', says retail giant well positioned to capture market share in current inflationary environment

** Meanwhile, AAII pessimism rises as investors turn more cautious

** SPX performance YTD: