Esteban Tesson

Memory Stocks Hit by Production Capacity Concerns

Shares of memory manufacturers fell sharply following cautious remarks from Seagate's CEO regarding the industry's production capacity in the face of exploding demand linked to artificial intelligence. Seagate stock dropped more than 10%, pulling down Micron (-8%), SanDisk (-9%), and Western Digital (-8%) in its wake. Investors are increasingly concerned about the ability of manufacturers to keep pace with the growing needs of AI-dedicated data centers.

May 18, 2026 at 10:35 pm

Regeneron hit by advanced melanoma treatment failing trial

Regeneron shares tumbled 10% in early Wall Street trading on Monday, following the failure of its experimental advanced melanoma treatment in a Phase III clinical trial. The US pharmaceutical company announced that the combination of fianlimab and cemiplimab failed to meet the study's primary endpoint of improving progression-free survival, the duration during which the disease does not worsen.

May 18, 2026 at 06:47 pm

UnitedHealth under pressure following Berkshire Hathaway's full exit

UnitedHealth shares fell more than 1.5% on Monday after Berkshire Hathaway announced that it has liquidated its entire stake in the US health insurance giant. The move comes as part of a portfolio reshuffle overseen by Greg Abel during Q1. Last year, Berkshire Hathaway acquired 5 million UnitedHealth shares, in a move that bolstered the stock and heightened expectations for the group's turnaround under Stephen Hemsley's leadership.

May 18, 2026 at 06:44 pm

UnitedHealth shares slip following Berkshire Hathaway's full exit

UnitedHealth shares fell more than 1.5% on Monday following the announcement that Berkshire Hathaway has sold its entire stake in the American health insurance giant. The move is part of a portfolio reshuffle overseen by Greg Abel during the first quarter. Last year, Berkshire Hathaway acquired 5m UnitedHealth shares, a transaction that supported the stock at the time and bolstered expectations for the group's recovery under the leadership of Stephen Hemsley.

May 18, 2026 at 06:19 pm

Regeneron hit by failure of advanced melanoma treatment

Regeneron shares fell nearly 10% early in the Wall Street session after its experimental treatment for advanced melanoma failed in a phase III clinical trial. The U.S. drugmaker said the fianlimab and cemiplimab combination did not meet the study’s primary endpoint, improving patients’ progression-free survival, the length of time the disease does not worsen.

May 18, 2026 at 06:01 pm

Kevin Warsh takes the helm of the Fed amid heightened economic tensions

On Wednesday Kevin Warsh was confirmed as Chairman of the US Federal Reserve by the Senate, which approved his nomination by a 54-45 vote. This represents the narrowest margin in modern history for a Fed Chair. At 56, Warsh will officially succeed Jerome Powell on Friday, who has held the position since 2018. Powell will, however, remain a member of the Board of Governors until 2028, notably to oversee the completion of the investigation into the renovation work at the central bank's headquarters.

May 14, 2026 at 09:51 am

Cisco buoyed by surge in AI-related orders

Cisco reported quarterly results and guidance that topped Wall Street expectations, driven by a sharp acceleration in orders for artificial intelligence infrastructure. The US group posted revenue of $15.84bn for the quarter ended April 25, compared with $15.56bn expected by analysts according to LSEG. Adjusted EPS reached $1.06, also beating forecasts. Following the release, the stock jumped 15% in after-hours trading.

May 14, 2026 at 09:00 am

Cisco lifted by a surge in artificial intelligence-related orders

Cisco reported quarterly results and guidance above Wall Street expectations, supported by a sharp acceleration in orders for artificial intelligence-related infrastructure. The U.S. group posted revenue of $15.84bn for the quarter ended April 25, versus $15.56bn expected by analysts, according to LSEG. Adjusted earnings per share reached $1.06, also above forecasts. Following the release, the stock jumped 15% in after-hours trading.

May 14, 2026 at 12:47 am

Kevin Warsh Takes the Helm at the Fed Amid Intensifying Economic Strains

Kevin Warsh was confirmed Wednesday by the Senate as chairman of the U.S. Federal Reserve, which approved his nomination by 54 votes to 45. The vote was the tightest in modern history for a Fed chair. At 56, Warsh will formally succeed Jerome Powell on Friday, who has held the post since 2018. Powell will nonetheless remain a member of the Board of Governors until 2028, in part to complete the investigation into the renovation work at the central bank's headquarters.

May 14, 2026 at 12:13 am

Broadcom Challenges Brussels in Antitrust Probe Linked to VMware

Broadcom has initiated legal proceedings against European antitrust authorities to contest requests for documents containing legal opinions drafted by its U.S. counsel. This action follows the investigation launched after the group's 2023 acquisition of VMware. The American semiconductor manufacturer has filed a case with the European Union General Court in Luxembourg, asserting that it is acting "on principle" to defend attorney-client privilege.

May 13, 2026 at 10:53 pm

Apple Pushes Back Against European Plans to Open Google Services to Rival AI

Apple has joined Google's criticism of measures being considered by the European Commission to force the US giant to open more of its services to competitors specializing in artificial intelligence. The Cupertino group says the proposals could weaken users' privacy, security, and the integrity of their devices. The response comes as part of consultations launched by Brussels on implementation of the Digital Markets Act, legislation aimed at curbing the power of big technology platforms.

May 13, 2026 at 09:59 pm

Tower Semiconductor lifted by AI chip demand and photonics contracts

Tower Semiconductor has raised its Q2 revenue guidance and announced contracts totaling $1.3bn related to chips for artificial intelligence data centers. The announcement propelled the Israeli foundry's stock up over 12% on Wall Street. The group is benefiting from robust demand for its analog and mixed-signal processors, driven by massive investments in data infrastructure and AI.

May 13, 2026 at 08:44 pm

Tower Semiconductor Rises on AI Chip Demand and Photonics Contracts

Tower Semiconductor has raised its second-quarter revenue guidance and announced the signing of contracts totaling $1.3bn related to chips for artificial intelligence data centers. The announcement propelled shares of the Israeli foundry up by more than 12% on Wall Street. The group is benefiting from robust demand for its analog and mixed-signal processors, driven by massive investments in data infrastructure and AI.

May 13, 2026 at 08:06 pm

Nebius buoyed by surging demand for AI infrastructure

Nebius Group reported a sharp increase in quarterly revenue, which nearly octupled y-o-y, driven by robust demand for artificial intelligence infrastructure and cloud services. Shares in the Dutch-based "neocloud" specialist jumped approximately 16% during trading, following the announcement. Revenue for the quarter ended March reached $399m, up from $50.9m a year earlier, beating analyst expectations according to LSEG data.

May 13, 2026 at 07:46 pm

Nebius Surges on Explosive Demand for Artificial Intelligence Infrastructure

Nebius Group reported a sharp increase in quarterly revenue, which nearly octupled year over year driven by sustained demand for artificial intelligence infrastructure and cloud services. Shares of the Netherlands-based "neocloud" specialist jumped approximately 16% during the session following the announcement. Revenue for the quarter ending in March reached $399m, up from $50.9m a year earlier, surpassing analyst expectations according to LSEG data.

May 13, 2026 at 07:35 pm

The South Korean "Ants" bring the KOSPI to new Highs

South Korea's benchmark index continues its ascent, hitting new highs at the start of the week. This rally is fueled by the surge of Samsung Electronics and SK Hynix in the AI memory market, as well as the growing appetite of local retail investors, nicknamed the "ants."

May 13, 2026 at 07:11 pm

Sam Altman accuses Elon Musk of attempting to seize control of OpenAI

Appearing before an Oakland federal court, Sam Altman has dismissed Elon Musk's allegations that OpenAI betrayed its founding mission to serve the public interest. The OpenAI CEO instead contends that the billionaire himself sought to take control of the company for personal profit. This litigation, stemming from a lawsuit filed by Musk in August 2024, could have significant ramifications for OpenAI's future as the firm prepares for a potential IPO that could value it at up to $1 trillion.

May 13, 2026 at 09:35 am

Google explores orbital AI data centers with SpaceX

Google has confirmed that it is in discussions with SpaceX and several other space industry players regarding Project Suncatcher, an initiative aimed at developing data centers in orbit. Through this program, Alphabet is exploring the creation of a network of solar-powered satellites equipped with Tensor processors to build a cloud infrastructure dedicated to artificial intelligence directly in space. A first prototype is expected to be launched around 2027 in partnership with Planet Labs.

May 13, 2026 at 09:28 am

Tariff Refunds Begin in the US Following Supreme Court Invalidation

The initial wave of refunds related to tariffs struck down by the US Supreme Court has begun reaching affected companies. Several months after the ruling deemed certain taxes implemented by Donald Trump unconstitutional, corporations including Oshkosh Corporation and Basic Fun have confirmed receipt of their first payments. Oshkosh noted, however, that it is not yet in a position to precisely estimate the total amount to which the company may be entitled.

May 13, 2026 at 09:21 am

Sam Altman Accuses Elon Musk of Attempting to Seize Control of OpenAI

Sam Altman has rejected Elon Musk's allegations in an Oakland federal court, dismissing claims that OpenAI betrayed its original mission to serve the public interest. The OpenAI CEO countered that the billionaire himself sought to take control of the company for personal profit. This legal battle, stemming from a lawsuit filed by Musk in August 2024, could have significant implications for the future of OpenAI as the firm prepares for a potential IPO that could value it at up to $1,000bn.

May 13, 2026 at 12:34 am

Google is Studying Orbital Data Centers for Artificial Intelligence With SpaceX

Google confirmed it is in talks with SpaceX as well as several players in the space sector as part of its Suncatcher project, an initiative aimed at developing data centers in orbit. Through this program, Alphabet is exploring the creation of a network of solar-powered satellites equipped with Tensor processors to build cloud infrastructure dedicated to artificial intelligence directly in space. A first prototype is expected to launch around 2027 in partnership with Planet Labs.

May 12, 2026 at 11:48 pm