The furnaces are roaring 24 hours a day on the Argor-Heraeus refinery in southern Switzerland, punctuated by the occasional plunk of a freshly poured gold bar falling out of its mould.
The refinery has by no means been busier, in line with co-chief government Robin Kolvenbach, and the foundry has been working across the clock since December to maintain up with large demand for 1kg gold bars in New York.
“Demand has elevated fairly a bit,” stated Kolvenbach. “Sometimes a interval of peak demand would final for one or two weeks. However peak demand like now we have for the time being, which has lasted greater than three months, it’s fairly uncommon.”
Since December, fears that Donald Trump may slap tariffs on gold imports have upended the market — and helped ship gold to a file excessive of practically $3,000 per troy ounce. Greater than $61bn of bullion poured into the US as merchants scrambled to keep away from the potential levies, distorting the nation’s commerce knowledge and sparking a shortage in London, the world’s largest gold buying and selling hub.

The American gold rush has saved Kolvenbach very busy, because of a quirk in world bullion markets: the 2 markets use completely different dimension bars. In London, most buying and selling is in 400-troy-ounce bars, every weighing about 12.5kg and roughly the scale of a brick.
New York’s Comex change, against this, makes use of smartphone-sized 1kg bars as its benchmark. Which means bars heading throughout the Atlantic should first make a cease in Switzerland — residence to the world’s largest gold refineries — to be melted down and recast.
In a world the place monetary transactions ping world wide in a fraction of a second, the booming triangular commerce underscores the gold market’s reliance on lumps of metallic. In regular occasions, claims on billions of {dollars} of gold are traded with out the bars ever leaving a vault.

However the distortions created by Trump’s radical commerce insurance policies have strained the system. Regardless that Trump has by no means talked about bullion tariffs, the slight likelihood that he may accomplish that was sufficient to ship the worth of gold futures within the US greater than in London, creating an arbitrage alternative for merchants prepared to move the metallic throughout the Atlantic.
The final time a major value hole opened was through the early phases of the pandemic. However the hoard of gold in New York has now surpassed even its earlier, Covid-era file.
“The bodily nature of gold is one thing that’s underestimated, significantly by a bunch of finance individuals who commerce it on their Bloombergs all day,” stated John Reade, senior market strategist on the World Gold Council. “Gold has monetary traits, however additionally it is a bodily asset.”
Liquidity disaster
The journey of the gold bars flowing into New York usually begins deep underground, in one of many 9 gold vaults beneath the Financial institution of England within the coronary heart of the Metropolis of London.
When an order is positioned to withdraw gold bars, a employee will go into the vaults and “dig out” the gold requested, which may usually contain shifting round different bars to find the precise bars which can be within the order. As a result of London is constructed on clay, the tender foundations of the BoE constructing imply that gold can solely be stacked to about shoulder-height.
The method could be very time-consuming, and has resulted within the largest bottleneck within the provide chain for 1kg bars. The employees who dig out gold have to be extremely vetted, fastidiously skilled, and powerful sufficient to carry gold bars all day lengthy — so staffing ranges can not shortly be elevated to fulfill short-term demand.

The primary indicators of the surge emerged in early December, when business figures gathered at a dinner hosted by the London Bullion Market Affiliation on the Nationwide Gallery, and mentioned the rising demand popping out of the US.
As merchants raced to maneuver gold from London to New York, the queue to withdraw gold from the BoE quickly stretched to greater than 4 weeks, inflicting a liquidity disaster within the London bullion market.
Quick-term lease charges for gold shot to record levels final month, as merchants struggled to get their fingers on bodily metallic, growing working capital prices for companies resembling refineries and jewelry makers.
“There was sturdy demand for supply slots,” acknowledged BoE deputy governor Dave Ramsden in a press convention in February, by which he admitted having been held up by a lorry within the bullion yard whereas coming into the constructing earlier within the day. “Gold is a bodily asset, so there are actual logistical constraints and safety constraints.”
The BoE holds bullion on behalf of dozens of central banks, in addition to business banks. Solely 6 per cent of the gold in its giant vaults belongs to the UK Treasury.

London’s pre-eminent place in bodily gold markets — regardless of the inefficiencies Ramsden described and the position of New York as the principle futures buying and selling hub — partly displays the decrease charges the BoE fees in contrast with rival business vault operations. Nevertheless it additionally underscores the overwhelming significance of belief within the gold market: buyers and central bankers are glad to park their gold beneath Threadneedle Road due to a file stretching again centuries.
“London has the historic benefit, fingers down, and it goes again to the gold customary, which operated very nicely, from the tip of the Napoleonic conflict, as much as the primary World Battle,” stated Jim Metal, chief valuable metals analyst at HSBC. “There’s a lengthy legacy of gold operations popping out of the UK and the Financial institution of England.”
‘Black swan occasion’
As soon as they depart the BoE vaults, bars are usually loaded into an armoured truck, pushed to Heathrow airport and flown to Zurich within the stomach of a passenger aircraft. For insurance coverage causes, passenger jets carry solely 5 tonnes of gold at a time.
From Zurich, the gold is pushed to a refinery, the place it’s melted down and recast, earlier than returning to be flown to the US. The price of this entire journey between London and New York — together with transportation and recasting — is round $3 to $5 per ounce, in line with the World Gold Council.

Contained in the Argor-Heraeus refinery, which is within the Swiss city of Mendrisio close to the Italian border, the big gold bars are melted down and reformed into a protracted strip inside a “steady casting” machine. As a result of the 400-ounce bars are already “positive gold” — referring to the 99.99 per cent purity requirement for investment-grade bullion — they don’t must be additional refined, simply reshaped.
To do that, the strip of gold from the casting machine is minimize into items which can be roughly one kilo. After a weight adjustment, it will get melted down once more, poured right into a one-kilo-bar mould — then cooled, stamped and polished.
Strolling across the foundry ground, Kolvenbach factors out the place two staff are pouring kilo bars by hand at adjoining furnaces — the method is working 24 hours a day for the time being, to fulfill the excessive demand.
The refinery does far more than recasting, although. It additionally takes in tough bars from mines and refines them into gold, silver and different metals — in addition to manufacturing jewelry and working a mint that stamps out smaller gold bars. Kolvenbach explains that a few of the most vital work within the constructing occurs inside its laboratory, which meticulously exams each bar that arrives within the facility.
Right here contained in the refinery, the liquidity disaster within the wider gold market has had a painful impact, by pushing up the lease charges for gold borrowed on a short-term foundation. To cut back working capital necessities and keep away from publicity to gold value fluctuations, refineries usually lease many of the gold that they’re engaged on whereas it’s within the manufacturing facility. The sudden surge in lease charges this spring dramatically elevated the working prices at Argor-Heraeus and different refineries.

Kolvenbach stated it was a “black swan occasion” that basically modified his value base. “Completely it has been a ache, for the entire business, as a result of in the long run everyone seems to be impacted,” he stated. Though lease charges have come down from their peak in February, they’re nonetheless about thrice greater than regular ranges.
Folks within the business provide differing explanations as to why New York and London nonetheless use completely different dimension gold bars for his or her contracts.
“Does it make sense? No,” stated Kolvenbach. “I had the identical query myself. To be sincere I by no means discovered a correct rationalization.”
Comex tried to launch a futures contract for big 400-ounce bars through the pandemic, however it didn’t take off.
Ruth Crowell, chief government of the LBMA, stated the markets would ideally use the identical dimension bar sooner or later. “I’d prefer to assume that after this, we will all agree that London and New York ought to be wanting on the form and dimension of bars,” she added.
Nonetheless, the system persists largely due to inertia, argues Reade.
“It definitely creates monetary alternatives for everyone concerned on this course of, whether or not it’s refiners, whether or not it’s shippers, whether or not it’s folks which can be ready to take the danger of shopping for kilo bars and delivery them to New York,” he stated.
As we speak, because the fears of gold tariffs diminish, the stream of gold into New York is slowing down. If Trump’s protectionist push does avoid valuable metals, merchants count on the stream to reverse, as long-term holders of gold eye London’s cheaper storage prices.
When that occurs, Swiss gold furnaces will likely be firing across the clock once more.