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Somewhat buried in ethereum’s big software makeover that rolled out Thursday is a code update known as Ethereum Improvement Proposal 3554, or EIP-3554 for short. It threatens to hasten the end of ethereum mining as we know it.

Since its launch, the ethereum community has talked about overhauling the way that it mints ether, which is the token associated with the ethereum blockchain. But getting people to make the change is going to require a push – and that push is something known as a difficulty bomb.

“It’s a mechanism in ethereum that makes it exponentially harder to mine,” said Tim Beiko, the coordinator for ethereum’s protocol developers. “It’s like we’re artificially adding miners on the network, which raises the difficulty, making it harder for every other miner that’s on the network to actually mine a block.”

EIP-3554 moves up the detonation date of that difficulty bomb by six months to December. Once it goes off, it will essentially make ethereum unmineable. 

Ethereum 2.0

Cryptocurrencies like ethereum and bitcoin regularly receive flack for the process of mining, which is how new coins are generated. Both currently use a so-called “proof-of-work” mining model, where machines solve complex math equations to create new coins. This makes it impossible for any centralized body to create new coins arbitrarily – there’s no equivalent of a central government to print new dollars – which crypto enthusiasts believe helps preserve the value of these cryptocurrencies.

However, this effort requires significant energy to power the computers used to perform the calculations, which has drawn criticism from outsiders concerned about energy shortages and carbon emissions.

The ethereum community has coalesced around the idea of migrating from proof-of-work to “proof-of-stake,” which requires users to leverage their existing cache of ether as a means to verify transactions and mint new tokens. This will still limit the amount of new coin created, but without requiring the energy used to run massive banks of computers to solve math equations.

Beiko tells CNBC the original proposal required these so-called validators to have 1,500 ether, a stake now worth around $4.2 million. To lower the barrier to entry, the new proof-of-stake proposal would only require interested users to have 32, or about $90,000.

“It’s still not a trivial sum, but it’s a much more accessible system,” said Beiko.

Since December 2020, the ethereum community has been testing out the proof-of-stake workflow on a chain called Beacon. 

Though proof-of-stake has been the plan for ethereum since the outset, developers have pushed back the rollout, because they had seen serious flaws in previous implementations. Beacon solves these problems, according to Beiko.

“We knew that there would be a lot of technical work to address things like the increased centralization that we see in other proof-of stake-systems,” he said. “We’ve achieved that with the Beacon chain, where there’s one or two orders of magnitude more validators…than any other proof-of-stake networks.”

Migrating the entire ethereum ecosystem to Beacon, an upgrade being dubbed “ethereum 2.0,” is the next step in the process. Getting everyone on board with the move is where the difficulty bomb becomes significant. 

The Ice Age

This isn’t the first time in ethereum’s history that a difficulty bomb has detonated.

It’s happened a few times, including in 2017, 2019, and again last year.

When a difficulty bomb detonates, it floods the system with artificial miners, driving up the mining difficulty. That means new blocks will appear more and more slowly on the network. “If you increase the difficulty really, really quickly, it’s just not profitable for new miners,” explained Beiko.

But each time it’s gone off, the community has reset the clock in order to bring the difficulty level back down to normal levels.

Etherscan.io

While you don’t need a bomb to go off to roll out proof-of-stake mining, it certainly helps move things along by closing the on-ramp to proof-of-work mining. Beiko calls it more of a stopgap measure. 

In essence, the point of the difficulty bomb is to force miners and node operators to upgrade their software after a predetermined amount of time has passed, according to Nic Carter, Castle Island Ventures general partner and Coin Metrics co-founder.

In December, if the deadline for detonation isn’t pushed back, the bomb will go off, and you’ll see another parabolic rise in difficulty, like the ones pictured in the chart above. But this time, developers won’t be rewinding the clock.

It will be the start of ethereum’s proof-of-work “Ice Age.”

Not everyone’s happy

While the upgrade to ethereum 2.0 has a lot of backers, not everyone is happy about the change.

“There are some miners who are against it, but it’s in their financial interest to be against it,” said Beiko. 

Once the protocol has fully migrated to a proof-of-stake model, there won’t be any revenue to be made from ethereum mining.

At that point, miners have a few options for what to do next. 

There are a lot of other chains that support GPU-based mining, so miners could simply choose to start mining other cryptocurrencies.

They could also decide to just shut down mining operations entirely and sell their mining equipment. Beiko expects to see a lot of that.

“We’ve also seen many mining farms and mining pools on ethereum start to get into staking,” he said.

“We’ve seen mining pools use their profits to set up validators on ethereum. We’ve also seen them offer pooling services for their users who might not have 32 ether but still want to validate the network.” So even if you don’t have $90,000 parked in ether, you still might be able to keep some skin in the mining game.

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Xiaomi delivers record cars in March as winners emerge in China’s EV race

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Xiaomi delivers record cars in March as winners emerge in China's EV race

A Xiaomi store in Shanghai, China, on March 16, 2025.

Qilai Shen/Bloomberg | Bloomberg | Getty Images

Chinese electric carmakers Xiaomi, Xpeng and Leapmotor each delivered nearly 30,000 or more cars in March, roughly twice several of their fellow startup competitors.

It’s a sign of how some automakers are pulling ahead, while BYD remains the market leader by far.

Xiaomi delivered a record number of electric vehicles in March, exceeding 29,000 units, the company announced on social media. That topped its prior run of delivering more than 20,000 vehicles in each of the past five months.

The SU7, Xiaomi’s flagship model, was involved in a crash on a highway on Tuesday that left three dead. The automaker on Tuesday afternoon released a statement on Chinese social media that the vehicle was in navigation on autopilot mode before the accident.

Based on preliminary information, the road was obstructed because of construction. The driver took control of the car but collided with construction infrastructure. Xiaomi added in the release that investigations were underway.

That came two weeks after the automaker announced on March 18 its goal to deliver 350,000 vehicles this year. There are also talks of the automaker expanding its second EV factory in Beijing to meet demand, Bloomberg reported on March 18. Xiaomi did not immediately respond to CNBC’s request for comment.

Its competitor Xpeng in March delivered 33,205 vehicles, the fifth consecutive month it has delivered over 30,000 units per month and reflecting a 268% surge in deliveries from the same month last year. March is also the fifth consecutive month the company has delivered over 15,000 units of the Mona M03.

Leapmotor delivered 37,095 vehicles, reflecting a 154% year-over-year growth. The Stellantis-owned automaker last month launched U.K. sales of two electric vehicle models, the T03 and the C10.

Li Auto delivered 36,674 vehicles in March, a 26.5% year-over-year increase, but fewer than every month in the second half of 2024. The company’s cars had gained early traction with Chinese consumers since most come with a fuel tank for charging the vehicle’s battery, reducing anxiety about driving range.

Tesla takes two of three top spots in China's most popular EV list

BYD sold 371,419 passenger vehicles in March, reflecting a year-over-year growth of 57.9%. Its overseas sales volume also hit a record high of 72,723 units in March.

In the same month, the automaker unveiled its “Super e-Platform” technology, which boasts 400 kilometers (roughly 249 miles) of range with five minutes of charging. The company in February also announced that it was integrating DeepSeek artificial intelligence to develop “DiPilot,” its advanced driver-assistance system.

Across the board, major companies across China’s electric car industry reported deliveries rose last month, indicating a pick-up in demand from the seasonally soft first two months of the year.

U.S. automaker Tesla sold 78,828 electric vehicles in China in March, marking a 11.5% year-over-year decline in growth.

Other Chinese carmakers saw growth in deliveries but some still struggled to break through the 20,000-unit mark.  

Nio delivered 15,039 vehicles, a 26.7% year-over-year growth, but well below the number of cars delivered in the months of May to December last year. Nio-owned Onvo, which markets its electric vehicles as family-oriented, in March recorded 15,039 units in deliveries.

Geely-owned Zeekr delivered 15,422 vehicles in March, increasing by 18.5% year over year. The company last month announced its rollout of free advanced driver-assistance technology to local customers in a bid to compete in the market.

Aito, as of April 2, has not published its delivery numbers for March. The automaker, which uses Huawei tech in its vehicles, on social media had reported monthly deliveries of 34,987 and 21,517 in January and February, respectively.

Quarterly performance

On a first-quarter basis, BYD remained in the lead with 986,098 vehicles sold. The automaker, which overtook Tesla in annual sales last year, surpassed the U.S. EV giant in battery electric vehicles sales this quarter.

Tesla sold 172,754 vehicles in China in the first quarter this year, according to monthly delivery numbers published by the China Passenger Car Association.

Xpeng also reported strong growth, with a total of 94,008 vehicles delivered in the quarter ending in March, reflecting a 331% year-over-year growth.

Leapmotor saw quarterly deliveries more than double to 87,552 units from 33,410 units the same period in 2024, according to publicly available numbers the company published.

However, Li Auto and Nio reported weaker growth than their competitors in the first quarter of the year.

Nio saw 42,094 vehicles delivered in the three months ended March 2025, an increase of 40.1% year over year. Li Auto saw a slower year-over-year growth of 15.5%, with a total of 92,864 vehicles delivered.

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De minimis trade loophole that boosted Chinese online retailers to end May 2

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De minimis trade loophole that boosted Chinese online retailers to end May 2

A driver for an independent contractor to FedEx delivers packages on Cyber Monday in New York, US, on Monday, Nov. 27, 2023.

Stephanie Keith | Bloomberg | Getty Images

President Donald Trump on Wednesday signed an executive order shutting the de minimis trade loophole, effective May 2.

Trump in February abruptly ended the de minimis trade exemption, which allows shipments worth less than $800 to enter the U.S. duty-free. The order overwhelmed U.S. Customs and Border Protection employees and caused the U.S. Postal Service to temporarily halt packages from China and Hong Kong. Within days of its announcement, Trump reversed course and delayed the cancellation of the provision.

Wednesday’s announcement, which came alongside a set of sweeping new tariffs, gives customs officials, retailers and logistics companies more time to prepare. Goods that qualify under the de minimis exemption will be subject to a duty of either 30% of their value, or $25 per item. That rate will increase to $50 per item on June 1, the White House said.

Use of the de minimis provision has exploded in recent years as shoppers flock to Chinese e-commerce companies Temu and Shein, which offer ultra-low cost apparel, electronics and other items. The U.S. Customs and Border Protection has said it processed more than 1.3 billion de minimis shipments in 2024, up from over 1 billion shipments in 2023.

Critics of the provision say it provides an unfair advantage to Chinese e-commerce companies and creates an influx of packages that are “subject to minimal documentation and inspection,” raising concerns around counterfeit and unsafe goods.

The Trump administration has sought to close the loophole over concerns that it facilitates shipments of fentanyl and other illicit substances on the claims that the packages are less likely to be inspected by customs agents.

Temu and Shein have taken steps to grow their operations in the U.S. as the de minimis loophole has come under greater scrutiny. After onboarding sellers with inventory in U.S. warehouses, Temu recently began steering shoppers to those items on its website, allowing it to speed up deliveries. Shein opened distribution centers in states including Illinois and California in 2022, and a supply chain hub in Seattle last year.

WATCH: President Trump signs executive orders for reciprocal tariffs

Pres. Trump signs executive orders for reciprocal tariffs

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Apple leads a drop in tech stocks after Trump tariff announcement

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 Apple leads a drop in tech stocks after Trump tariff announcement

Apple CEO Tim Cook, center, watches during the inauguration ceremonies for President Donald Trump, right, and Vice President JD Vance, left, in the rotunda of the U.S. Capitol in Washington, Jan. 20, 2025.

Shawn Thew | Afp | Getty Images

Apple slid more than 6% in late trading Wednesday and led a broader decline in tech stocks after President Donald Trump announced new tariffs of between 10% and 49% on imported goods.

The majority of Apple’s revenue comes from devices manufactured primarily in China and a handful of other Asian countries. Nvidia, which manufactures new chips in Taiwan and assembles its artificial intelligence systems in Mexico and elsewhere, fell about 4%, while electric vehicle company Tesla dropped 4.5%.

Across the rest of the megacap universe, Alphabet, Amazon and Meta all dropped between 2.5% and 5%, and Microsoft was down by almost 2%.

If Apple’s postmarket loss is matched in regular trading Thursday, it would be the steepest decline for the stock since September 2020.

Trump on Wednesday afternoon said the new taxes on imported goods would be a “declaration of economic independence” for the country. He announced a 10% blanket tariff on all imports, and higher duties for specific countries, including 34% for China, 20% for European nations, and 24% for Japanese imports, based on what tariffs they charge on U.S. exports, Trump said.

“We will supercharge our domestic industrial base, we will pry open foreign markets and break down foreign trade barriers,” Trump said during his speech. “Ultimately, more production at home will mean stronger competition and lower prices for consumers.”

Stocks broadly got hit by Trump’s announcements. An exchange-traded fund tracking the S&P 500 slid 2.8%, while an ETF following the Nasdaq 100 lost more than 3%.

During his speech, Trump praised Apple, Meta, and Nvidia for spending money and investing in the United States.

“Apple is going to spend $500 billion, they never spent money like that here,” Trump said. “They’re going to build their plants here.”

The Nasdaq just wrapped up its worst quarter since 2022, dropping 10% in the first three months of the year, though the tech-heavy index rose in each of the first two days of the second quarter.

WATCH: President Trump signs executive orders for reciprocal tariffs

Pres. Trump signs executive orders for reciprocal tariffs

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