Switzerland's getting into a currency war with us? Brilliant!

Spend, spend, spend.

It's sort of like the Baader-Meinhof Phenomenon – you hear a relatively rare phrase once, and then it starts springing up all over the place. Today's is "currency war".

At the Telegraph, Ambrose Evans-Pritchard has uncovered evidence that Switzerland and the UK are "effectively fighting a 'low intensity' currency war against each other". He writes:

It seems you can’t debase your coinage these days even if you try.

The Bank of England is straining every sinew to drive down sterling with quantitative easing, and what happens?

The Swiss National Bank trumps Threadneedle Street with an outright blitz of Gilt purchases. They just print it, and buy.

Switzerland is one of the most forthright currency manipulators out there at the moment, as it struggles to hold its franc above 1.20 to the euro. This chart, from the ECB, shows the effect of that fight:

Although currency speculators have been battering at the floor, the Swiss central bank has held to its promise (but it did drop down to 1.1997 francs for a few minutes back in April last year) by buying a metric shittonne (technical term) of eurobonds. Now that it owns so many of those, it is trying to diversify its holdings into other currencies, "allegedly into Aussies, Loonies (Canada), Scandies, Won?, Real? but above all pounds" according to Evans-Pritchard.

The Swiss are doing it because a weaker currency, particularly relative to the Eurozone, is good for them – it boosts deficits and interest rates, both things which ought to keep them out of recession. But we want the same thing. Hence: currency war.

In the US, meanwhile, some economists have argued that America needs to get tough on currency manipulators. The Washington Post's Dylan Matthews writes:

In a new working paper, Joe Gagnon and Fred Bergsten at the Peterson Institute argue not just for import tariffs like those Schumer advocates, but for a full-frontal assault on countries that are manipulating their currencies… Specifically, they want the U.S. to offer the eight worst currency manipulators — China, Denmark, Hong Kong, Korea, Malaysia, Singapore, Switzerland and Taiwan — an ultimatum: Stop manipulating, or else we’ll do the following:

Buy up exactly as many assets in their currencies as they have in ours… tax the earnings from dollar-denominated assets as punishment… treat currency manipulation the same way we treat export subsidies for the purposes of imposing retaliatory tariffs [or] take the manipulators to the World Trade Organization (WTO).

The first of those options is an archetypal currency war. Gagnon and Bergsten argue that making that threat would "currency manipulation, make the dollar less expensive, and thus promote U.S. exports"; the standard refrain of those entering currency wars.

And Matthews offers the standard objection:

The risk is that Gagnon and Bergsten’s policies would only provoke the targeted countries, leading them to respond with still more manipulation and/or tariffs on U.S. goods, setting off a full-fledged currency and trade war that just leaves all parties worse off.

Except that that's not really true (well, the trade war part is). A full-fledged currency war – whether it's between America and all eight of its named "manipulators" or Britain and the Swiss – is indeed a zero-sum game when it comes to the actual level of the currencies. Both GBP and CHF cannot weaken against each other at the same time, definitionally.

But while the war is pointless, the act of fighting it could be a good thing. The Atlantic's Matthew O'Brien writes:

The downside of devaluation is that no country gains a real trade advantage, and weaker currencies means the prices of commodities like oil shoot. But and here's the really important part devaluing means printing money. There isn't enough money in the world. That's the simple and true reason why the global economy fell into crisis and has been so slow to recover. It's also the simple and true reason why the Great Depression was so devastating. We know from the 1930s that such competitive devaluation can turn things around.

War is good if it creates more of something you want. A "charity war" between friends is good because it leads to more donations. A currency war is good because it leads to more money. If war is politics by other means, a currency war is stimulus by other means.

Think of it by analogy to fiscal stimulus. Sometimes, a government decides to do that directly. But just as frequently – say, during the Second World War – it embarks on a massive deficit-funded spending programme because it feels it has to, and it just so happens to be macroeconomically beneficial as well.

So please, Switzerland, keep buying British bonds. It will force the Bank of England into making the moves it ought to have done a long time ago.

Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Want to send a positive Brexit message to Europe? Back Arsene Wenger for England manager

Boris Johnson could make a gesture of goodwill. 

It is hard not to feel some sympathy for Sam Allardyce, who coveted the England job for so many years, before losing it after playing just a single match. Yet Allardyce has only himself to blame and the Football Association were right to move quickly to end his tenure.

There are many candidates for the job. The experience of Alan Pardew and the potential of Eddie Howe make them strong contenders. The FA's reported interest in Ralf Rangner sent most of us scurrying to Google to find out who the little known Leipzig manager is. But the standout contender is Arsenal's French boss Arsene Wenger, 

Would England fans accept a foreign manager? The experience of Sven Goran-Eriksson suggests so, especially when the results are good. Nobody complained about having a Swede in charge the night that England won 5-1 in Munich, though Sven's sides never won the glittering prizes, the Swede proving perhaps too rigidly English in his commitment to the 4-4-2 formation.

Fabio Capello's brief stint was less successful. He never seemed happy in the English game, preferring to give interviews in Italian. That perhaps contributed to his abrupt departure, falling out with his FA bosses after he seemed unable to understand why allegations of racial abuse by the England captain had to be taken seriously by the governing body.

Arsene Wenger could not be more different. Almost unknown when he arrived to "Arsene Who?" headlines two decades ago, he became as much part of North London folklore as all-time great Arsenal and Spurs bosses, Herbert Chapman or Bill Nicholson, his own Invicibles once dominating the premier league without losing a game all season. There has been more frustration since the move from Highbury to the Emirates, but Wenger's track record means he ranks among the greatest managers of the last hundred years - and he could surely do a job for England.

Arsene is a European Anglophile. While the media debate whether or not the FA Cup has lost its place in our hearts, Wenger has no doubt that its magic still matters, which may be why his Arsenal sides have kept on winning it so often. Wenger manages a multinational team but England's football traditions have certainly got under his skin. The Arsenal boss has changed his mind about emulating the continental innovation of a winter break. "I would cry if you changed that", he has said, citing his love of Boxing Day football as part of the popular tradition of English football.

Obviously, the FA must make this decision on football grounds. It is an important one to get right. Fifty years of hurt still haven't stopped us dreaming, but losing to Iceland this summer while watching Wales march to the semi-finals certainly tested any lingering optimism. Wenger was as gutted as anybody. "This is my second country. I was absolutely on my knees when we lost to Iceland. I couldn't believe it" he said.

The man to turn things around must clearly be chosen on merit. But I wonder if our new Foreign Secretary Boris Johnson - albeit more of a rugger man himself - might be tempted to quietly  suggest in the corridors of footballing power that the appointment could play an unlikely role in helping to get the mood music in place which would help to secure the best Brexit deal for Britain, and for Europe too.

Johnson does have one serious bit of unfinished business from the referendum campaign: to persuade his new boss Theresa May that the commitments made to European nationals in Britain must be honoured in full.  The government should speed up its response and put that guarantee in place. 

Nor should that commitment to 3m of our neighbours and friends be made grudgingly.

So Boris should also come out and back Arsene for the England job, as a very good symbolic way to show that we will continue to celebrate the Europeans here who contribute so much to our society.

British negotiators will be watching the twists and turns of the battle for the Elysee Palace, to see whether Alain Juppe, Nicolas Sarkozy end up as President. It is a reminder that other countries face domestic pressures over the negotiations to come too. So the political negotiations will be tough - but we should make sure our social and cultural relations with Europe remain warm.

More than half of Britons voted to leave the political structures of the European Union in June. Most voters on both sides of the referendum had little love of the Brussels institutions, or indeed any understanding of what they do.

But how can we ensure that our European neighbours and friends understand and hear that this was no rejection of them - and that so many of the ways that we engage with our fellow Europeans rom family ties to foreign holidays, the European contributions to making our society that bit better - the baguettes and cappuccinos, cultural links and sporting heroes remain as much loved as ever.

We will see that this weekend when nobody in the golf clubs will be asking who voted Remain and who voted Leave as we cheer on our European team - seven Brits playing in the twelve-strong side, alongside their Spanish, Belgian, German, Irish and Swedish team-mates.

And now another important opportunity to get that message across suddenly presents itself.

Wenger for England. What better post-Brexit commitment to a new Entente Cordiale could we possibly make?

Sunder Katwala is director of British Future and former general secretary of the Fabian Society.