U.S. stock markets suffered their worst day since the Covid pandemic after Donald Trump announced sweeping new tariffs, triggering a global selloff and wiping out $470 billion in value from tech giants Apple and Nvidia. From a report: The tech-heavy Nasdaq fell 6%, while the S&P 500 and the Dow dropped 4.8% and 3.9%, respectively. [...] Meanwhile, the US dollar hit a six-month low, going down at least 2.2% on Thursday morning compared with other major currencies and oil prices sank on fears of a global slowdown. Though the US stock market has been used to tumultuous mornings over the last few weeks, US stock futures -- an indication of the market's likely direction -- had plummeted after the announcement. Hours later, Japan's Nikkei index slumped to an eight-month low and was followed by falls in stock markets in London and across Europe.

Multiple major American business groups have spoken out against the tariffs, including the Business Roundtable, a consortium of leaders of major US companies including JP Morgan, Apple and IBM, which called on the White House to "swiftly reach agreements" and remove the tariffs. "Universal tariffs ranging from 10-50% run the risk of causing major harm to American manufacturers, workers, families and exporters," the Business Roundtable said in a statement. "Damage to the US economy will increase the longer the tariffs are in place and may be exacerbated by retaliatory measures."

The climate crisis is on track to destroy capitalism, a top insurer has warned, with the vast cost of extreme weather impacts leaving the financial sector unable to operate. From a report: The world is fast approaching temperature levels where insurers will no longer be able to offer cover for many climate risks, said Günther Thallinger, on the board of Allianz SE, one of the world's biggest insurance companies. He said that without insurance, which is already being pulled in some places, many other financial services become unviable, from mortgages to investments.

Global carbon emissions are still rising and current policies will result in a rise in global temperature between 2.2C and 3.4C above pre-industrial levels. The damage at 3C will be so great that governments will be unable to provide financial bailouts and it will be impossible to adapt to many climate impacts, said Thallinger, who is also the chair of the German company's investment board and was previously CEO of Allianz Investment Management. The core business of the insurance industry is risk management and it has long taken the dangers of global heating very seriously. In recent reports, Aviva said extreme weather damages for the decade to 2023 hit $2tn, while GallagherRE said the figure was $400bn in 2024. Zurich said it was "essential" to hit net zero by 2050.

Despite promises of more efficient streaming, the AV1 video codec hasn't achieved widespread adoption seven years after its 2018 debut, even with backing from tech giants Netflix, Microsoft, Google, Amazon, and Meta. The Alliance for Open Media (AOMedia) claims AV1 is 30% more efficient than standards like HEVC, delivering higher-quality video at lower bandwidth while remaining royalty-free.

Major services including YouTube, Netflix, and Amazon Prime Video have embraced the technology, with Netflix encoding approximately 95% of its content using AV1. However, adoption faces significant hurdles. Many streaming platforms including Max, Peacock, and Paramount Plus haven't implemented AV1, partly due to hardware limitations. Devices require specific decoders to properly support AV1, though recent products from Apple, Nvidia, AMD, and Intel have begun including them. "In order to get its best features, you have to accept a much higher encoding complexity," Larry Pearlstein, associate professor at the College of New Jersey, told The Verge. "But there is also higher decoding complexity, and that is on the consumer end."

Longtime Slashdot reader theodp writes: A coalition of Washington state business leaders -- which includes Microsoft President Brad Smith and Amazon Chief Legal Officer David Zapolsky -- released a letter Wednesday urging state lawmakers to reconsider recently proposed tax and budget measures. "I actually think it's an almost unprecedented outpouring of support from across the business community," said Microsoft's Smith in an interview. In their letter, which reads in part like it could have been penned by a GenAI Marie Antoinette, the WA business leaders question whether any more spending is warranted given how poorly Washington's 4th and 8th graders compare to children in the rest of the nation on test scores. The letter also laments the increase in WA's homeless population as it celebrates WA Governor Bob Ferguson's announcement that he would not sign a proposed wealth tax.

From the letter: "We have long partnered with you in many areas, including education funding. Despite more than doubling K-12 spending and increasing teacher salaries to some of the highest rates in the nation, 4th and 8th grade assessment scores in reading and math are among the worst in the country. Similarly, we have collaborated with you to address housing and homelessness. Despite historic investments in affordable housing and homelessness prevention since 2013, Washington's homeless population has grown by 71 percent, making it the third largest in the nation after California and New York, according to HUD. These outcomes beg the question of whether more investment is needed or whether we need different policies instead."

Back in 2010, Smith teamed with then-Microsoft CEO Steve Ballmer and then-Amazon CEO Jeff Bezos to fund an effort to defeat an initiative for a WA state income that was pushed for by Bill Gates Sr. In 2023, Bezos moved out of WA state before being subjected to a 7% tax on gains of more than $250,000 from the sale of stocks and bonds, a move that reportedly saved him $1.2 billion in WA taxes on his 2024 Amazon stock sales.

Robotics and machine learning engineer Naveen Kul developed WattWise, a lightweight open-source CLI tool that monitors power usage via smart plugs and throttles system performance based on electricity pricing and peak hours. Tom's Hardware reports: The simple program, called WattWise, came about when Naveen built a dual-socket EPYC workstation with plans to add four GPUs. It's a power-intensive setup, so he wanted a way to monitor its power consumption using a Kasa smart plug. The enthusiast has released the monitoring portion of the project to the public now, but the portion that manages clocks and power will be released later. Unfortunately, the Kasa Smart app and the Home Assistant dashboard was inconvenient and couldn't do everything he desired. He already had a terminal window running monitoring tools like htop, nvtop, and nload, and decided to take matters into his own hands rather than dealing with yet another app.

Naveen built a terminal-based UI that shows power consumption data through Home Assistant and the TP-Link integration. The app monitors real-time power use, showing wattage and current, as well as providing historical consumption charts. More importantly, it is designed to automatically throttle CPU and GPU performance. Naveen's power provider uses Time-of-Use (ToU) pricing, so using a lot of power during peak hours can cost significantly more. The workstation can draw as much as 1400 watts at full load, but by reducing the CPU frequency from 3.7 GHz to 1.5 GHz, he's able to reduce consumption by about 225 watts. (No mention is made of GPU throttling, which could potentially allow for even higher power savings with a quad-GPU setup.)

Results will vary based on the hardware being used, naturally, and servers can pull far more power than a typical desktop -- even one designed and used for gaming. WattWise optimizes the system's clock speed based on the current system load, power consumption as reported by the smart plug, and the time -- with the latter factoring in peak pricing. From there, it uses a Proportional-Integral (PI) controller to manage the power and adapts system parameters based on the three variables. A blog post with more information is available here.

WattWise is also available on GitHub.

An anonymous reader quotes a report from TechCrunch: Anthropic announced on Wednesday that it's launching a new Claude for Education tier, an answer to OpenAI's ChatGPT Edu plan. The new tier is aimed at higher education, and gives students, faculty, and other staff access to Anthropic's AI chatbot, Claude, with a few additional capabilities. One piece of Claude for Education is "Learning Mode," a new feature within Claude Projects to help students develop their own critical thinking skills, rather than simply obtain answers to questions. With Learning Mode enabled, Claude will ask questions to test understanding, highlight fundamental principles behind specific problems, and provide potentially useful templates for research papers, outlines, and study guides.

Anthropic says Claude for Education comes with its standard chat interface, as well as "enterprise-grade" security and privacy controls. In a press release shared with TechCrunch ahead of launch, Anthropic said university administrators can use Claude to analyze enrollment trends and automate repetitive email responses to common inquiries. Meanwhile, students can use Claude for Education in their studies, the company suggested, such as working through calculus problems with step-by-step guidance from the AI chatbot. To help universities integrate Claude into their systems, Anthropic says it's partnering with the company Instructure, which offers the popular education software platform Canvas. The AI startup is also teaming up with Internet2, a nonprofit organization that delivers cloud solutions for colleges.

Anthropic says that it has already struck "full campus agreements" with Northeastern University, the London School of Economics and Political Science, and Champlain College to make Claude for Education available to all students. Northeastern is a design partner -- Anthropic says it's working with the institution's students, faculty, and staff to build best practices for AI integration, AI-powered education tools, and frameworks. Anthropic hopes to strike more of these contracts, in part through new student ambassador and AI "builder" programs, to capitalize on the growing number of students using AI in their studies.

The FBI searched two homes of Indiana University Bloomington data privacy professor Xiaofeng Wang last week, following months of university inquiries into whether he received unreported research funding from China, WIRED reported Wednesday.

Wang, who leads the Center for Distributed Confidential Computing established with a $3 million National Science Foundation grant, was terminated on March 28 via email from the university provost. The university had contacted Wang in December regarding a 2017-2018 grant in China that listed him as a researcher, questioning whether he properly disclosed the funding to IU and in applications for U.S. federal research grants.

Jason Covert, Wang's attorney, said Wang and his wife Nianli Ma, whose employee profile was also removed, are "safe" and neither has been arrested. The couple's legal team has viewed a search warrant but received no affidavit establishing probable cause.

An anonymous reader shares a report: Amazon has put in a last-minute bid to acquire all of TikTok, the popular video app, as it approaches an April deadline to be separated from its Chinese owner or face a ban in the United States, according to three people familiar with the bid.

Various parties who have been involved in the talks do not appear to be taking Amazon's bid seriously, the people said. The bid came via an offer letter addressed to Vice President JD Vance and Howard Lutnick, the commerce secretary, according to a person briefed on the matter. Amazon's bid highlights the 11th-hour maneuvering in Washington over TikTok's ownership. Policymakers in both parties have expressed deep national security concerns over the app's Chinese ownership, and passed a law last year to force a sale of TikTok that was set to take effect in January.

Representatives Alexandria Ocasio-Cortez and Anna Paulina Luna introduced bipartisan legislation in March to cap credit card interest rates at 10% annually as Americans' debt hits record levels. "Credit cards with high interest rates regularly trap working people in endless cycles of debt," Ocasio-Cortez said in a statement.

Credit card debt has reached $1.2 trillion in Q4 2024, up from $720 billion in the same quarter of 2004, according to Federal Reserve Bank of New York data. Average annual percentage rates nearly doubled to 21% in 2024 from 12% in 2003. The Federal Reserve Bank of Philadelphia reported a record number of cardholders making only minimum payments in Q3 2024, "showing signs of consumer stress."

Further reading: Study Reveals Why Credit Card Interest Rates Remain Stubbornly High.

An anonymous reader quotes a report from TechCrunch: Zelle is shutting down its stand-alone app on Tuesday, according to a company blog post. This news might be alarming if you're one of the over 150 million customers in the U.S. who use Zelle for person-to-person payments. But only about 2% of transactions take place via Zelle's app, which is why the company is discontinuing its stand-alone app.

Most consumers access Zelle via their bank, which then allows them to send money to their phone contacts. Zelle users who relied on the stand-alone app will have to re-enroll in the service through another financial institution. Given the small user base of the Zelle app, it makes sense why the company would decide to get rid of it -- maintaining an app takes time and money, especially one where people's financial information is involved.

A new paper [PDF] from the AI Disclosures Project claims OpenAI likely trained its GPT-4o model on paywalled O'Reilly Media books without a licensing agreement. The nonprofit organization, co-founded by O'Reilly Media CEO Tim O'Reilly himself, used a method called DE-COP to detect copyrighted content in language model training data.

Researchers analyzed 13,962 paragraph excerpts from 34 O'Reilly books, finding that GPT-4o "recognized" significantly more paywalled content than older models like GPT-3.5 Turbo. The technique, also known as a "membership inference attack," tests whether a model can reliably distinguish human-authored texts from paraphrased versions.

"GPT-4o [likely] recognizes, and so has prior knowledge of, many non-public O'Reilly books published prior to its training cutoff date," wrote the co-authors, which include O'Reilly, economist Ilan Strauss, and AI researcher Sruly Rosenblat.

With the signing of HB25-1040 on Monday, Colorado now defines nuclear as a "clean energy resource" since it doesn't release large amounts of climate-warming emissions. "The category was previously reserved for renewables like wind, solar and geothermal, which don't carry the radioactive stigma that's hobbled fission power plants following disasters like Chernobyl and Fukushima," notes Colorado Public Radio. From the report: In an emailed statement, Ally Sullivan, a spokesperson for the governor's office, said the law doesn't advance any specific nuclear energy project, and no utility has proposed building a nuclear power plant in Colorado. It does, however, allow nuclear energy to potentially serve as one piece of the state's plan to tackle climate change. "If nuclear energy becomes sufficiently cost-competitive, it could potentially become part of Colorado's clean energy future. However, it must be conducted safely, without harming communities, depleting other natural resources or replacing other clean energy sources," Sullivan said.

By redefining nuclear energy as "clean," the law would let future fission-based power plants obtain local grants previously reserved for other carbon-free energy sources, and it would allow those projects to contribute to Colorado's renewable energy goals. It also aligns state law with a push to reshape public opinion of nuclear energy. Nuclear energy proponents promise new reactor designs are smaller and safer than hulking power plants built in the 20th century. By embracing those systems, bill supporters claimed Colorado could meet rising energy demand without abandoning its ambitious climate goals.

Substack has announced it will legally support foreign writers lawfully residing in the U.S. who face government targeting over their published work, partnering with the nonprofit FIRE to expand its existing Defender program. The Verge reports: In their announcement, Substack and FIRE mention the international Tufts University student who was arrested by federal agents last week. Her legal team links her arrest to an opinion piece she co-wrote for the school's newspaper last year, which criticized Tufts for failing to comply with requests to divest from companies with connections to Israel. "If true, this represents a chilling escalation in the government's effort to target critics of American foreign policy," Substack and FIRE write.

The initiative builds on Substack's Defender program, which already offers legal assistance for independent journalists and creators on the platform. The company says it has supported "dozens" of Substack writers facing claims of defamation and trademark infringement since it launched the program in the US in 2020. It has since brought Substack Defender to writers in Canada and the UK.

MoffettNathanson has crowned YouTube the "New King of All Media" as the Alphabet-owned video platform has become a major force in Hollywood, dominating time spent watching TV. From a report: The firm estimates that YouTube as a standalone business could be worth as much as $550 billion -- or nearly 30% of the tech giant's current valuation. The figure is based on the firm's analysis of enterprise value as a multiple of revenue in 2024 for Netflix (10.5x revenue), Meta (8.8x), Roku (2.4x), Warner Bros. Discovery (1.4x), Fox (1.3x) and Disney (1.3x).

In 2024, YouTube was the second-largest media company by revenue at $54.2 billion, trailing behind only Disney. However, the MoffettNathanson analysts predict YouTube will take the top spot in 2025, becoming a leader in both engagement and revenue. "YouTube has the potential to become the central aggregator for all things professional video, positioning itself to capture a share of the $85 billion consumer Pay TV market and the ~$30 billion streaming ex. Netflix market in the U.S.," they wrote in a Monday research note. "On monetization, when comparing YouTube's massive TV screen engagement to its estimated TV revenue, it remains significantly under-monetized relative to its scaled reach and differentiated offering. This signals a substantial runway for improving its monetization strategy."

Credit card interest rates, which averaged 23% in 2023, are significantly higher than any other major loan product primarily due to non-diversifiable default risk and banks' market power, according to research published by the Federal Reserve Bank of New York.

The comprehensive study, which analyzed 330 million monthly credit card accounts, found that while high default losses contribute to elevated rates, they explain only part of the picture. Even high-FICO borrowers pay spreads exceeding 7% above the federal funds rate. Researchers determined that credit card banks have substantial pricing power, achieved through exceptionally high operating expenses -- about 4-5% of dollar balances annually -- with marketing costs ten times higher than those at other banks.

"Credit card charge-off rates are highly correlated with default rates on banks' other loans as well as on corporate bonds," the researchers said, noting that default risk cannot be diversified away across lending markets, particularly during economic downturns. The study estimated that exposure to aggregate default risk carries a premium of 5.3% per year, which fully explains the relationship between return on assets and credit scores.

Credit cards are ubiquitous in American finance, with 74% of adults owning at least one card, and the payment method accounting for 70% of retail spending. According to the research, 60% of accounts carry balances month-to-month.