TradFi News | Nasdaq Drops 3.4% in Week as AI Chip Stocks Slump; Berkshire Posts Record $9.6 Billion Buyback

US stock futures open Sunday evening after a damaging week for AI stocks. The Nasdaq Composite fell 3.4% in the week to November 6, the S&P 500 lost 2.7%, the Dow slipped 0.9% and the small-cap Russell 2000 shed 2.05%, according to Investor’s Business Daily.Nasdaq 100 futures were indicated modestly lower after Nvidia’s board opened an investigation following reports that CEO Jensen Huang was targeted by a suspected Chinese espionage operation, according to IBD, CNBC and NBC News. Lawmakers from both parties have also raised questions about the reports, CNBC said.AI Hardware Stocks Lead the LossesAfter a post-election rally on Wednesday, when the Dow jumped 3%, AI infrastructure stocks fell sharply on Thursday and dragged down the wider market. Friday’s AI-led bounce faded into a mixed close.Sandisk (SNDK) rose 3.55% to $835.06 on Friday but fell 27.4% on the week. It is down 64.5% from its late-June peak, according to MarketSurge.Micron (MU) gained 5.1% to $690 on Friday but dropped 22% on the week and is 45% below its high.The VanEck Semiconductor ETF (SMH) fell 11.2% on the week and the iShares Expanded Tech-Software ETF (IGV) lost 5.2%.Apple, Microsoft and Amazon Hold UpBig tech held up better than the rest of the sector:Amazon (AMZN) jumped 7.9% on the week to $259.30.Microsoft (MSFT) rose 1.7% to $530.62.Apple (AAPL) slipped 0.7% to $342.37.Microsoft and Amazon rallied Wednesday as investors bet that existing data center operators could gain if rivals’ projects are delayed, according to IBD.Oil Falls 12.8% as Yields Hit Two-Month LowUS crude futures fell 12.8% on the week to $90.83 a barrel, pressured by hopes for US–Iran diplomacy, according to IBD. President Donald Trump told CNN that renewed US strikes on Iran are “highly unlikely” if talks progress. The Energy Select SPDR ETF (XLE) fell 12%.The 10-year Treasury yield fell 7 basis points to 4.86%, a two-month low.Some sectors gained. The US Global Jets ETF (JETS) rose 6.6%, homebuilders gained 1.3% and financials 1.15%.Berkshire Posts Record BuybackBerkshire Hathaway bought back $9.6 billion of its own shares in the third quarter, up from $4.5 billion in Q2. That beat its previous record of $9.3 billion, set in Q3 2020.Operating earnings: fell 6% to $12.7 billion, roughly in line with estimates, as weaker insurance underwriting and investment income weighed. Railroad, utility and other operations improved.Revenue: rose 11% to $105.6 billion, above estimates of $100.96 billion.Cash: rose to $377.4 billion from $365.5 billion in Q2, but remains below Q1’s $397.4 billion.Stock portfolio: Berkshire sold a net $400 million or so of stocks in Q3, after net purchases of about $20 billion in Q2.Berkshire stock has risen for five straight weeks and hit a record high on Thursday. Under new CEO Greg Abel, the company has largely kept Warren Buffett’s conglomerate-and-investment approach.Indexes Below Key Moving AveragesAll major indexes are below their 50-day moving averages, and the Nasdaq and Russell 2000 are also below their 200-day lines, according to IBD. IBD’s Ed Carson said one weak bounce is not enough to signal a market bottom, and that investors should be defensive and wait for clear evidence of a turnaround.