Market News for September 18, 2026
Every story Market Flux published on September 18, 2026.
- Unusual Volume
Accenture Stock Swings From 4% Drop to Rebound After Guggenheim Downgrade and Anthropic Safety Deal
Accenture shares fell roughly 4% Friday morning after Guggenheim cut its rating to Neutral from Buy and removed its price target, citing channel checks that showed no meaningful improvement…
- Market Flux Event
Fed Rate Hike and Dot Plot Signal More Tightening, Sending Treasury Yields to Multi-Year Highs
The Federal Reserve raised its benchmark interest rate by 25 basis points on Wednesday, lifting the federal funds rate to a target range of 3.75% to 4.00%, and signaled further tightening…
- Market Flux Event
BOJ Hikes Rates to 1.25% and Signals Further Tightening as Sovereign Rating Actions Hit Cyprus and Poland
The Bank of Japan raised its policy rate by a quarter point to 1.25% on Friday, a move anticipated by all economists surveyed by Bloomberg. Governor Ueda signaled openness to additional…
- Market Flux Event
Trump Announces Permanent US Security Control Over Greenland in Deal With Denmark
President Trump announced on September 18 that the United States has reached an agreement with the Kingdom of Denmark and Greenland granting the US permanent control over security in…
- Most Active
Xenon Pharmaceuticals Plunges 30% After Pausing Azetukalner Enrollment in Phase 3 Depression Trials
Xenon Pharmaceuticals shares fell as much as 30% on Friday, their worst single-day decline since 2017, after the company voluntarily halted new enrollment in its Phase 3 studies of…
- Top Mover
Qualcomm Shares Fall 6% as Apple Chip Exit Accelerates and Month-Long Rally Unwinds
Qualcomm shares dropped 6% to $178.15 on Friday, September 18, reversing a significant portion of a rally that had built over the prior month. The selloff was driven by renewed concern that…
- Top Mover
GM Delivers First Patriot Missile Parts to Lockheed Martin as Its Stock Slides Nearly 5% on Market Rotation
General Motors has entered the defense supply chain, delivering housing components for Lockheed Martin's PAC-3 Patriot missile interceptors just 22 days after signing a partnership…
- Top Mover
Wells Fargo Cuts Netflix to Underweight With $57 Target as Engagement Collapses, Stock Falls 4.8%
Wells Fargo downgraded Netflix to Underweight from Equal Weight on Friday and slashed its price target to $57 from $80, making it the only analyst on Wall Street with a sell-equivalent…
- Top Mover
Accenture Falls 4% on Guggenheim Downgrade Before Recovering on Anthropic AI Safety Deal
Accenture shares fell roughly 4% on September 18 after Guggenheim cut the stock to Neutral from Buy and removed its price target, citing a disconnect between the stock's sharp recovery and…
- Top Mover
Lam Research Stock Jumps 7% as Chip Equipment Names Lead Semiconductor Sector Rally
Lam Research shares climbed as much as 7% on Friday, September 18, reversing a portion of recent losses and outpacing the broader semiconductor sector. Applied Materials rose 4% and KLA…
- Top Mover
SanDisk Surges Up to 11% After S&P 100 Addition Announced, Boosted by $14 Billion Buyback and AI Rally
SanDisk shares climbed as much as 11% on Friday, September 18, closing out a session in which the stock was among the biggest movers in the market. The primary catalyst was the announcement…
- Top Mover
Applied Materials Rises 4% as Chip Equipment Stocks Lead the Semiconductor Sector on Friday
Applied Materials closed Friday up roughly 4%, or about $17.35, to $434.74, outperforming both the broader semiconductor group and the wider market on a session notable for divergent moves…
- Market Flux Event
Accenture to Serve as Embedded Safety Evaluator for Anthropic Frontier AI as IPO Plans Advance
Anthropic has selected Accenture to assess the safety of its frontier AI technology, making Accenture one of the third-party embedded evaluators that Anthropic CEO Dario Amodei had publicly…
- Market Flux Event
Nvidia-Backed Nscale Files for US IPO on NYSE Under Ticker NSCL as Revenue Backlog Tops $100 Billion
Nscale, the London-based AI data center company backed by Nvidia, filed publicly for a US initial public offering on September 18, 2026, targeting a listing on the New York Stock Exchange…
- Market Flux Event
Trump Bans CNN, MS NOW and Politico from White House Over Coverage
President Trump announced Friday that he is banning CNN, MS NOW and Politico from the White House effective immediately, citing their coverage of his administration. Trump posted on Truth…
- Market Flux Event
US Auto Industry Urges Trump to Bar Chinese Cars as Xi Summit Approaches With BYD in Play
A broad coalition of automakers, suppliers and dealers formally urged President Trump not to allow Chinese vehicles to be sold or manufactured in the United States ahead of next week's…
- Market Flux Event
Warren Buffett Steps Down as Berkshire Hathaway Chairman at 96, Son Howard Takes the Role
Warren Buffett, 96, announced Friday that he is resigning as chairman of Berkshire Hathaway, a position he has held since 1970, completing his full exit from leadership of the conglomerate…
- Market Flux Event
Newsom Signs Executive Order Directing California to Develop AI Kill Switch and Safety Framework
California Gov. Gavin Newsom on Friday signed an executive order aimed at addressing potential dangers from artificial intelligence, directing a group of experts to convene and produce…
- Market Flux Event
Bitcoin Tops $80,000 and Triggers $183 Million Short Squeeze as CFTC Files Crypto Rules With White House
Bitcoin surged 5.88% on September 18 to hit an intraday high of $80,935, reclaiming the $80,000 level for the first time since its 2026 highs and catching bearish traders deeply offside…
- Unusual Volume
Xenon Pharmaceuticals Shares Plunge 25% After Pausing Azetukalner Depression Trials on Adverse Events
Xenon Pharmaceuticals fell roughly 22 to 25 percent in premarket trading on September 18, 2026, after the company voluntarily paused new enrollment in its Phase 3 studies of azetukalner in…
- Top Story
Warren Buffett Steps Down as Berkshire Hathaway Chairman, Takes Title of Chairman Emeritus
Warren Buffett announced on Friday that he is stepping down as chairman of Berkshire Hathaway, the roughly $1 trillion conglomerate he has led for more than six decades, citing the passage…
- Market Flux Event
Fed Rate Hike to 3.75%-4% Triggers Global Tightening Wave and Forces RBI October Decision
The US Federal Reserve resumed its rate-hike cycle on September 17, raising its benchmark rate by 25 basis points to a range of 3.75%-4.00% and signaling further tightening ahead. The move…
- Market Flux Event
CoreWeave Upsizes Convertible Notes Offering to $3.7 Billion Due 2033
CoreWeave priced an upsized private offering of convertible senior notes on September 18, 2026, raising $3.7 billion after lifting the deal from its originally announced size of $3.0…
- Market Flux Event
Bank of Japan Raises Rates to 1.25% But Yen Slides as Ueda Signals Caution on Further Tightening
The Bank of Japan raised its benchmark interest rate by a quarter percentage point to 1.25% on September 18, bringing the policy rate to its highest level since 1995 and delivering the move…
- Market Flux Event
Wall Street Most Bullish on European Stocks Since 2018 as Nvidia Outlook Lifts Global Chipmakers
Market strategists have issued their most optimistic September forecast for European equities in eight years, according to a Bloomberg survey of 16 strategists published September 18. The…
- Market Flux Event
Warren Buffett Steps Down as Berkshire Hathaway Chairman at 96, Son Howard Takes the Role
Warren Buffett, 96, has stepped down as chairman of Berkshire Hathaway, the $1 trillion conglomerate he has led since 1965, the company announced Friday morning. Buffett has been named…
- Market Flux Event
Bank of Japan Raises Rates to 1.25%, a 31-Year High, in Fastest Hike of Its Current Cycle
The Bank of Japan raised its benchmark policy rate by 25 basis points to 1.25% on September 18, the highest level since 1995, in a 7-2 vote that accelerated the pace of its tightening…
- Market Flux Event
Bank of Japan Raises Policy Rate to 1.25 Percent, Its Highest Level Since 1995
The Bank of Japan raised its benchmark policy rate by 25 basis points to 1.25% on September 18, marking the highest borrowing costs in Japan in 31 years and the first hike since June. The…
- Market Flux Event
Bank of Japan Raises Rates 25 Basis Points to New 31-Year High as Energy-Driven Inflation Persists
The Bank of Japan raised its benchmark interest rate by 25 basis points on Friday, lifting borrowing costs to a new 31-year high in a move that was widely anticipated by markets. The hike…